Post Phase-Inverter Master Volume & Taming Stage Levels

There are more important things than tone. I know…the very nature of that seems heretical. But, if we have established that our evoking-of-tears-anti-solo-with-sweet-Johnny-Buckland-ripoff-reverb-decay actually means nothing without the chord structure from the bass, piano, acoustic, rhythm electric, cello, whatever……then if you also cannot hear the chord structure from the bass, piano, acoustic, rhythm electric, cello, whatever……then there comes a point where cranking your amp to get the tubes warm and the the preamp and power amp sections ‘pushed’ for stellar tone, actually succeeds only in making that amazingly sweet tone mean absolutely nothing.

And of course, this is the point where most guitar articles usually go into the ‘next killer amp modeler’, or tube-buffered direct box, or some other gimick that is supposed to emulate a cranked amp. Which it won’t. There is no ’emulation’ of signal actually passing analog through tube-driven amplification, and certainly no emulation for actual sound waves naturally coming through speakers and literally moving air. Now, I can’t tell you what you like and don’t like. (Much as I wish I could…hehe.) So it is possible (though I cannot see how… 😉 ) to like sound from amp modelers and such. But it’s their own sound. Not a live amplifier with real tubes misused and overdriven. Just as you can get string sounds from synthesizers that you can like for what they are; but they’re not an orchestra. There’s a reason actual films still use the London Symphony Orchestra and LA Philharmonic for their scores. Well, most films. ‘Raptor Island’ definitely used keyboard strings. And ‘Rats.’ You know, the one where half-finished computer-animated rats float on top of people as they gnaw their ears off. (And they’re not supposed to be floating…that’s due to the afore-mentioned ‘half-finished’ nature of the animation.) All the while the synthesizer is banging out some unfortunate ‘string’ part that makes me want to hurt myself.

Raptor Island
(They never use the gun. I have no idea why. And this movie vaguely reminds me of some other movie…can’t think of it right now…something about ‘Jurassic’? I guess if it works once, may as well rip it off and do it again…and at lower quality. And you don’t even have to rip it off, either. You can have the copyright, and still do a lower quality ripoff. Like Jurassic Park 3. A whole hour of the same rubbish I’ve already seen 4 times. I mean, uh……2 times. I didn’t watch Raptor Island. Or Raptor Island 2. Yep, there’s a ‘2’.)

So I guess what I’m saying is that amp modelers are the ‘Raptor Island’ of tone. (*Barricades himself behind stacks of point-to-point wired tube amps for the onslaught of Lincoln Brewster videos that are sure to come flooding in.*) But seriously, if you use them and are getting tears of sweet tone, more power to you. Make that music, be that person, and rock. But for me, maybe I’m crazy, but it’s gotta be a bit more real. And I’m not talking about killing stage volume altogether, or getting a 1/2 watt ZVex amp or something. You need volume. Tubes need to be hot, every amp has a sweet spot on its gain knob, speakers need to be pushed, and air needs to be moved. A little stage volume is a good thing. Keeps things feeling fluent and live. Too pristine gives off a sterile feel that looks good on paper, but feels awkward live. But you have got to be able to find a way to get this tone and feel at volumes that can still blend with the band, and can still give your sound tech enough control to be able to blend with what he hears at the front of the house. Because like it or not, we cannot face-melt and run sound at the same time. I mean, I guess you could get a wireless system and do it, but knowing us, we’d just end up cranking our gain knob on the actual sound board. Because ‘these go to eleven.’

Enter post phase-inverter master volume. It comes at the end of the preamp circuit, as an overall, well, master volume. And when done right, it allows stacks of tube saturation without any noticeable tone loss, warmth loss, high end less, frequency response loss, feel loss, or weight loss. (This is like an infomercial.) Beautiful. I had this mod put into my Divided by 13 RSA23 by Jerry Blaha in Hollywood. And he does a fantastic job, with some of his own ideas thrown into the mod…such as placing it after the power amp. Which I love the sound of, but does go against the definition of most ‘post-phase inverter’ master volumes. However, he describes it as sounding most like ppimv. But there are many techs and amp builders who can do this. Gives you the tone you want, without having to get an amp-in-a-box, run your amp in a closet, or build a little house for it on stage.

Storm Trooper in San Diego (small)
(Speaking of bad movies, my wife took me on a date yesterday…yep, she took me…she’s amazing…to one of our favorite lounges and a show in downtown San Diego. Little did we know it was the first day of Comic Con. And there were so many things I did not understand. Costumes, people who looked like they were in costumes but you could tell they wore that every day, lines that wrapped around 4 downtown blocks of girls waiting to see the guy from Twilight…and for once I don’t know the actor’s name, and I would like to keep it that way…please do not tell me what it is…, and oh ya, storm troopers outside Dussini’s. My wife snapped that picture. Most times, you don’t need comedy films or stand-up clubs. You just need people who are into video games, Twilight, and galaxies far, far away. Because of course we guitarists never get into our stuff at all. 😉 )

Last month, I posted an article on the different ways to get stage volume down. There’s power dampening, attenuators, master voltage, closets, etc. I’ve tried almost all of them, with the exception of master voltage. And thus far, a well-designed post phase-inverter master volume circuit is the best I have tried. I did a quick video on it, complete with playing through the click channel on the RSA23 with the gain dimed. And if you’ve ever had the opportunity to crank gain on a KT88 or EL34 amp, ya…it’s not quiet. But so incredibly saturated. So, with the ppimv mod, you can actually use the cranked gain sound.

So here’s the video, complete with me trying to figure out what exactly you’re supposed to do with a cranked gain Marshall/HiWatt sound. It was awkward. But hopefully you can hear the tones from the amp that the ppimv allows you to achieve:

Yep. Sounds like Jimmy Page without the talent part. But the gain that you can get, as well as clean tones on the verge of breakup, are pretty cool; and at bedroom, club, and church volumes. Obviously, you’re not pushing the speakers as hard…but you are giving them a broad spectrum of sound with the added gain, even at low volumes, which pushes them in a different way. And with a well-done ppimv circuit, you can turn it all the way up, and still get the sound of the amp wide open as if the master volume wasn’t there. With stuff like this available, I simply cannot see why you would ever have need of amp modelers. (Okay, maybe for reliability, tonal constancy regardless of temperature, versatility, etc……but that stuff just ruins my point. So I’m not going to mention it.) But the main thing is that you can still get your tone, feel, dynamics, warmth, and either gain or clean on the verge of gain (whichever your preference is for the given situation) at volumes that will still blend with the music. Because, unfortunately, music is kind of the point…and our guitar and it’s subsequent tone (hopefully) are there to support the music. Which sucks sometimes, because I do like it to be about me. Less tears at night. But I guess if it can’t always be about me, post phase-inverter master volume is the next best thing.

Oh and speaking of storm troopers (haha…such awesomely smooth transitions today), if you’ve never seen this, watch the right side of your screen:

hehehe

Splendid.
Karl.

139 thoughts on “Post Phase-Inverter Master Volume & Taming Stage Levels

  1. $240 plus parts, usually. Unless it’s an unusual circuit and he has to build a schematic. Which is way cheaper than a good attenuator, but also of course not transferable from amp to amp like an attenuator.

  2. This is exactly why I am looking at the Matchless Lightning as my new amp. I was amazed at how incredible it sounded even at lower volumes.

    I have discovered, to my dismay, that our sound guys at church pull the guitar out of the mains because they can clearly hear my amp au’ natural. I have been trying to get a lower volume with the same tone for months and I just end up turning up the amp in the end. I installed a weber attenuator in my Traynor which did make a big difference, but it still just isn’t quite the same.

    Besides. The Matchless amp is just plain cool. It lights up.

  3. Tom–haha The lighting up is absolutely the best part. :)

    But ya, that’s another great reason for bringing stage volume down. Because so many times you’re asked to turn your amp sideways or backwards or something, but then you’re still so loud, you’re taken out of the house anyway. Now the only thing the congregation or audience is hearing is the secondhand mud bouncing of the side wall. hehe And ya, Matchless definitely has really good master volumes. Great info, and thanks for bringing that up!

    RyanJ–for me, it was tone. I bought a Ho attenuator, which was supposedly the best money could buy, and a/b’d it with the ppimv. And it sounded good, but nowhere near as clear, smooth, and natural as the ppimv. (One of the guitarists on this board who has a great ear says that the Ho attenuators aren’t what they used to be; so that could be a factor. But most of my research has them supposed to be sounding still really good.) There’s just something real the ppimv captures that all the attenuators I’ve tried don’t. To my very, very humble and untrained ears.

    Also, it’s nice to not have to carry around an attenuator. hehe But that’s just laziness. :)

  4. This is funny… because this is the very reason I use the X3L….

    (Okay, maybe for reliability, tonal constancy regardless of temperature, versatility, etc……but that stuff just ruins my point. So I’m not going to mention it.)

    When giging alot it is also easy to pack in and out…

    The tone you are getting out of that amp is just wonderful. I would be satisfied with that tone for at least 6 months. 😉

  5. good to know. i don’t have much attenuator experience, i had a badcat leash for awhile, i actually liked the sound of my amp turned down with pedals better than w/ the leash.
    you might be indirectly talking me into something.

  6. Sal–haha Ya, I give amp modelers and such a hard time, but I do recognize their purpose and significance. Every once in a while…we’re talking like, once a year…usually on those 117 degree July Sundays like this coming weekend, the thought of an X3L flashes into my brain. I then do my best to stuff it far, far away and hope nobody noticed. hehe :)

    And thanks for the kind tonal words. lol Six months would be pretty good for me, too! Cheers.

    RyanJ–I totally hear ya. Some attenuators sound worse than like, turning on an od pedal and turning the volume down on it. hehe Some are decent, but I’m just liking the ppimv.

    And if I indirectly help you spend more money on more gear and mods and such, then my purpose has been accomplished. hehe 😉 That’s why guitarists hang out…to talk each other into more gear.

  7. I’ll pray for you guys. :-) I say this with affection and a smile: sounds like Porsche drivers who just have to have a Ferrari. I think I’m more in the Prius driver longing for a Mustang category.

    I played at a Christmas party for our company once with some co-workers. At that time I had an old Peavey Renown — 160 solid state watts into two 12 inch speakers. My bandmates complained that it was making their fillings loose. LOL So I miked my little Carvin Vintage 16 into the PA we used at the Radisson Hotel in Sacramento. Cheap stuff compared to the discussion here.

    Speaking of gear-heads, check out this guy
    http://www.youtube.com/user/Burgerman666

    Lastly, still on tone, a quote from the Foo Fighter’s Dave Grohl on Gibson RD Artist guitars:

    “RDs are awesome. It’s like holding a kitchen table over your chest and having it scream like a jet airplane. I like that they’re really heavy and can sound fat or bright. They’re kind of nasty guitars — played through a Boogie Rectifier, they sound completely insane.”

  8. Randy–as my amp tech says, ‘Better than drugs or gambling.’ :) But in all seriousness, I’m okay with having a lot of money go into something that is artistic, and is used for God. I drive an older car, have no boats, motorcycles, or other toys; no cable, live in an apartment, and I shop at Ross and snack on peanuts. hehe :) So I’m kinda proud that the one thing on which I actually spend 10% of what most people’s cars cost, is going towards bettering me artistically, hopefully bettering people around me, and helping to glorify God.

    But you have a point, brother. 😉 And of course the answer to the Porsche/Ferrari or D13/Matchless question is……both. lol

    Sal–Nice! I’ve been looking at that guy’s stuff. There’s actually a link to his old Worship Musicians message board at the bottom of my links to the right. But I think it shut down. But Joe’s a great guy, and next time I don’t have money tied up in Divided by 13’s and Matchless’s I need to sell, hehe, I’ll definitely have to try some of his stuff. Are you a friend of his, or do you play one of his amps? :) Good times!

  9. Yesterday I was changing out the speaker in my Carvin 16 from the stock cardboard made speaker to a Celestion V30 and had posted that on my facebook… my pastor saw it and sent me this link, he used to play with him at a church he planted. So I saw this and thought for a moment…”I gotta have one of these”, It was a fleeting thought… I came to my senses after I woke up this morning…

    I do like the sound of the Celestion in my V30, this speaker really smoothed it out. Cost so far…. Carvin16=Free, V30=Free…grand total=Free How sweet is that? Now I am looking to get the mod kit for it…gonna have to pay for that…;-)

  10. I heart master volume. I don’t know if mine’s ppimv but it sounds like what you’re describing. I set my gain where I want it and then just turn the master up and down for the room. Brilliant. The best part is if you turn the master to 10 it’s essentially bypassed and you have the original amp circuit at full power.

  11. I have a modeling amp and used it extensively during a two year period when I stepped back from recording and playing live because of a BAD experience I had playing in my first Christian band. Go Figure. I think I was paying penance.

    Anyway, it was a Line6 Flextone. I used it for teaching and annoying my children. It was pretty effective at both and overall it didn’t sound bad. I played it long enough that I totally forgot how a tube amp feels. Then a buddy of mine stopped by with his old Fender Princeton and left it at the house for me to play around with. He never got it back and I’ve got all my tube amps out of storage.

    There is just a certain something about the feel of tube amps. If you play one, you know what I mean. Is it possible to get the “tone” of a tube amp from modeling? Yes…you can. I spent a couple of weeks once programming my Flextone to sound pretty much exactly like my Orange, Fender and Frenzel tube amps. I got really close, but…it didn’t feel the same. And feel is as much a part of my tone as what comes out of the speakers.

    I know that Lincoln Brewster uses modeling when touring. I’ve seen him live and he’s a great player and sounded good coming out of the mains. In the same song, he could go from Fender clean in the verse to Marshall crunch in the refrain to Boogie scream for the lead. Setup time at the gig was probably 5 minutes. I’m happy for him. But…lets be honest here. He’s still just trying to copy tones that come out of a tube amp naturally. And he’s doing it for convenience sake.

    I don’t think I’ve ever met a guitar player that didn’t like the tone of a cranked tube amp. That’s because nothing sounds and feels like one. Would it be a pain to run a three amp setup with a switching system to manage it. Yes (I’ve done it.) it is a pain. Do I still use that three amp system outside of my house? No. Why? For convenience sake.

    My worship pastor at church uses the Line6 for times when he wants to lead with his electric and it sounds fine. It doesn’t cut through the mix like a tube amp will but….that’s what he’s got me for. 

    What does this have to do with anything about anything?

    Nothing.

  12. Mark,

    I couldn’t agree more. Even though I use an amp modeler, it is for making life easier when gigging a lot.

    Nothing can replace the feel of hot tubes. My favorite set up is still my guitar plugged direct to an amp. Any effects will have to come thru my finger tips. There is not a single one of us who read Karl’s post that would actually prefer modeling over the real thing.

    In our ultimate search for tone we not only want to satisfy our inner ear but like you wrote…

    “I’ve seen him live and he’s a great player and sounded good coming out of the mains.”

    We as guitar players also seek that recognition from other players to say such things as “it sounded good”.

    As for me…. I just hope to one day sound like Karl.

  13. “‘Better than drugs or gambling.’ But in all seriousness, I’m okay with having a lot of money go into something that is artistic, and is used for God. ”

    Absolutely ! I sure wouldn’t attempt to influence anyone else on how they spend their money. At least not here. I think I’ll try that “better than drugs or gambling” on my wife next time I “need” something in the way of gear. :-)

    Not likely to work on her though, she’ll walk across the street to pick up a dime. I count my blessings though, she won’t set foot in a store anything like Macy’s or Saks Fifth Avenue.

    I may just have to rent a decent tube amp to see what everyone is talking about. My carvin Vintage 16 doesn’t move enough air for me to “get it.” Of course in our church the Vintage 16 is about as large as I could get away with. I did try a big “Eddie Van Halen” full stack once in an empty guitar center store. Something like a 100watt tube head sitting on two 4×12 cabinets. Now that was fun ! I’d like to hear more details on how you describe this tube “phenomenon.” Particularly when it’s a big enough rig to move air and interact with your guitar. I hear terms like sag, breath, etc.

  14. Sal–all for free? Man, you gotta get me to your guitar store!! hehe 😉 But seriously, that’s totally awesome. I think the V30’s are the best mid-priced guitar speaker, hands down. Very underrated.

    And oddly enough, I knew exactly what ‘Celestion in my V30’ meant. lol

    Mike–right on! It might be ppimv; either that, or just a really well-designed master volume circuit. Isn’t it glorious to be able to get the same tones at all levels? Getting shivers just thinking about it.

    Mark–great info! And I agree with you that most amp modeler users are just doing it for convenience, and that it can definitely be more convenient. But what I just said isn’t nearly as eye-catching in a blog post as ‘solid state sucks’. So hence, solid state sucks! 😉

    But I hear ya. hehe

    Sal–I agree. There’s no replacement for hot tubes. But I do hear your point, that there are times when all the gear is just too much to lug around, yet you still need a Marshall, Vox, and Fender sound all at the same gig. :)

    I think I just have a complex. Because I would probably bring a Vox, Marshall, and Fender, and then get angry when the sound guy asked me to turn down. hehehe J/K…I hope. :)

    Randy–lol If that phrase works, you gotta let me know! hehe :) No, but in all seriousness, my wife’s really sweet about it.

    As for the tube thing, sometimes cheap or old tubes will cause you not to hear it. That’s how it was with me. Everyone was talking about that warm, huge tube sound. So I bought a friend’s old Peavey Classic 100 (which is a great and very underrated amp, by the way). But when I turned it on, I was like, what’s the big deal? Finally I changed out the preamp tubes (which were very old, and stock no name Chinese ones, too), and all of a sudden, the difference was huge! Bigger than going from the Crate solid state to the tube amp. So, old or cheap tubes can definitely kill the ability to get that, ‘Oh, that’s why everyone’s talking about tube amps’ feel.

  15. I got a hold of the guy who sells the mods… and it will cost me 40 bucks. so that will be the cost of the amp total…..YEEEEEHAAAAAAA!!!!!!!

  16. Hey Karl,
    Awesome article. I totally agree with what you are saying, and I feel your struggle. I too Hate to sacrifice tone, but recognize the need for balanced band sound.
    I don’t want to sound all snotty, but I think you gave a slightly wrong impression of what PPIMV is, but you did a great job of showing the improvement in sound it provides.

    The phase inverter is still often 12ax7 tube types and comes after the preamp/tonestack. The PPIMV however, does choke the signal before the power tubes still. You do get the benefit of the pushed phase inverter tube though, and it sure does add a lot to the tone. And, it might even get you the exact tone that you are after.
    However, the only way to get the actual pushed power tube sound is with what you described as a “Master Voltage”. Power-Scaling is the most famous one, and the one that I use in all my amps is called VVR (Variable Voltage Regulator). THis guy, Dana, sells the kits and knows his stuff when it comes to building amps:
    Check out Hall Amplification and click on products and KIts:
    http://www.hallamplification.com/main.html?src=%2F#2,2

    Matt

  17. Hey Matt,

    Thank you for the info! And I really appreciate your unassuming way of presenting it as well. :) You are right, and I’ll edit the article right now; I should have said, ‘comes after the preamp circuit.’
    I may have chosen my words poorly, as my tech describes his mod as sounding like a ppimv after the power amp. Seems more like power scaling, but I figured I’d take his word on it, as I am admittedly not as intelligent or learned as I’d like to be when it comes to the technical side of amps. But since you brought it up, I definitely do not want to be misleading. So consider it fixed, and my hat is off to you sir.
    Again, thank you. I make every effort to be accurate on this blog, but sometimes I’m just flat out wrong. And many times stupidly wrong, at that. hehe That’s probably due to buying gear when I should be studying actual music, and the parts that make it up. :)

    Cheers,
    Karl

  18. So Karl, I guess I am more confused than before, and my curiosity is really piqued.
    I understand that your tech’s mod is something that he developed himself a bit to sound really good. And, it really shouldn’t be your responsibility to have to fully understand it. You paid for it, you use it, and you love it.

    I’m more interested in backtracking and correcting any assumptions I may have made in error.

    So, does he mean to say that it is technically a type of PPIMV that SOUNDS LIKE it is after the power amp, or that it ACTUALLY IS after the Power Amp? I am 100% sure that your guy knows much more about amps than myself (not false modesty- he is a real tech).
    So, I am wondering what his mod his technically classified as. My first assumption is that it is a Post Phase Inverter Master Volume that he has designed quite well. But I don’t think (could be wrong) that it is possible to do it after the Power amp in the signal flow. Well, I guess you can dump power after the power amp, but that would just make it an attenuator, and no one would bother using the term PPIMV in regard to it and it would involve some pretty big components.

    I keep wondering if he is using some sort of Master Voltage or Variable Voltage Regulator and just trying to use a term that more people are familiar with in amp-using circles. I’ll often label my VVR knob as Master just because very simply, it acts like the uninitiated would dream that a Master volume should work-> all the same tone, but just quieter.

  19. hey karl, i tried something similar last night with my ycv40 setup. instead of using an attenuator (after the power-amp), i plugged in a volume pedal thru the fx-loop (after pre-amp). there is definitely a difference in sound.

    with the attenuator, i can really push the 5881’s to break-up even with the pre-amp volume at 4. with vp, no matter how much i push the volume on the pre-amp (tried it at 7), i can’t get the 12ax7 tubes to saturate/break-up. maybe i should get new pre-amp tubes.

    the nice thing without the attenuator, is that i can hear the low-end better. the problem is it sounds a little brittle on the high-end … so i might still come back to the attenuator.

    oh the choices … to think that the congregation probably doesn’t care! hehe 😀

  20. BCMatt–haha Man, I wish I could understand what my tech was saying half the time! I believe the master is after the power amp, making it more of a power scaling thing…but when he saw the glazed over look in my eyes, he probably mentioned ppimv as what it most sounds like. That’s the best I can do for now; I’ll ask him to go into more detail next time I see him.

    Either way, I should have written ‘after the preamp’ in the original article; thank you so much for pointing that out! :) Cheers, my friend!

    Rhoy–Nice! I love hearing about experimenting like that. :) Ya, the volume pedal in the effects loop will definitely take a good deal away…strange that you can’t get the preamp tubes to break up, though. Maybe you do need new ones. Huh. Well, and from what I’ve read, Traynors have a very good amount of clean headroom. Of course, you’d know more than me, as I’ve never owned one.

    And that’s been my issue with attenuators, too…very brittle in the treble regions. Seriously…so many choices! haha If only they’d build the churches large enough to accommodate our amps!! lol

  21. Karl, just to clarify something:
    Most master volumes are after the preamp. A PPIMV is even later, after the last “preamp” tube, the phase inverter. There is a school of thought that says that most of the smooth drive we love comes from the phase inverter. And if that theory is correct, the PPIMV should allow the same amount of drive at lower levels because the phase inverter is being run full bore. The problem is this school of thought is wrong (because I said so). The beautiful drive comes from the power tubes, and a true PPIMV will still turn down the power going to those, and it will sound inferior to the amp being run all-out. So, yours might be different if it doesn’t turn the suck up when you turn the volume down.
    Also, have you ever tried the Weber MASS attenuators? They are supposed to be less brittle than the others, because they actually drive a voice coil as a resistor. [Good] Speakers naturally compress the highs a bit, smoothing out the upper end, and the Weber is supposed to use this as a way to get good tone at lower levels. I haven’t tried one yet, but I will be shortly. No one else at my church appreciates how good my amp can sound, even though it’s only running at 15 watts.

  22. Lol! I love it. Oh how I wish things were true because I said so! hehe In my humble opinion, it all depends on what sound you’re going for. I’ve heard some guys sound fantastic with just preamp drive…others, like say Jimmy Page, seem to rely on power tube breakup. In which case, yes, master voltage, power scaling, or attenuators can be good options.

    I’ve tried one of the smaller Weber attenuators, and it was very decent…sounded just as good to my humble ears as the Ho. However, I just have never been able to find the smoothness I’m looking for out of an attenuator. But that’s just me. And it could very possibly be operator error. 😉 hehe

  23. An ID 10 T error? I personally have never used one, either. I just run my amp at 15 watts, and its quiet enough. Usually the drummer is louder than me anyway.

  24. Karl,
    I’m kinda lost. What’s the difference between a PPIMV and a cheapo “suck knob” from ebay to attenuate via FX loop?
    I always thought the “suck knob” was ripoff… but the hole thing about pushing the phase inverter tube sounds awesome! I’ll give it a try with a pedal or something…
    Even if it doesn’t do wonders to the tone it will probably help since my JCM900 master fader starts abruptly at 1.5 – more precise volume control.

    Just so you don’t hate me for using a JCM 900: I also have a 1965 Blackface Fender Vibrochamp 😉

    I love you site and I’m catching up reading all your posts!

  25. Hey,

    Recently came across your blog… some great insights for the most part. Just wanted to make a comment on the PPIMV. It works well in a lot of amps, but not all…

    Depends where the gain is coming from, basically. I’ve built a few amps myself, and gotten into circuit design lately.

    In Vox type of amps, a lot of the grind comes from the preamp and how it hits the phase inverter (which, in that amp clips really hard). So a PPIMV really gives you something other master volumes don’t – hence sounding more like the cranked amp.

    However, in something like an 18 watt marshall, the vast majority of the overdrive comes from a really clean pre-amp/phase inveter hitting the power tubes hard. Putting in a PPIMV only cleans up the sound of the amp – rather than getting it to sound overdriven at a lower volume level. Kind of the opposite of what one wants!

    In larger fender & marshall types of amps, a master volume after the phase inverter may or may not sound better than one before the phase inverter… some designs seem to work better in different amps. Just know the PPIMV doesn’t universally sound better.

    Something after the power tubes, like you described, though, would allow the power tubes to do their thing still… you’d need some pretty hefty parts to handle the voltage/current in that part of the amp though, if that is what is really being done…

  26. Hey there guys, love the discussions on this page. I build amps, infact we are currently building for Avatar Speakers may be building for Xits and Naylor as well. here are some thinigs I have to say about PPIMV’s, one like patrick says they sound absolutlely horrible in certain amp circuts, the actual 1974 18 watt circut is horrible with a PPI…..yet a TMB modded 1974 circut sounds great. Headroom of the power section plays a great deal into this, if you already have a great, fat punchy power section you will have a great sounding PPIMV. If you have a really brite snarly power section it tends to sound brittle. The amps we have installed them on and that I have owned include the new Avatar 45 amp, a 1983 JCM 800 (still had brutal volume at 126db out of a 50 watt head), Splawn Quickrod, 18 watt Marshall TMB built by us. We did a lot of work designing the Avatar 45’s PPIMV but the other thing we did is change it to a single input but left the bright/normal channels in the circut with the ability to switch between them or cascade them all the while still allowing you the ability to use the PPIMV. With all PPIMV the presence control is affected at lower master volume settings. David Bray who is the absolute master of building PPIMV amps plain and simple (as well as Paul Reed Smith Customs LOL) explains it best. Most people think they getting a overdriven and saturated power section when the amp is cranked but it is actually the pre amp section that clips the most. Also adding a Global control makes a you more able to dial in your tone with a PPIMV. Remember Transformers also play a huge role, using an underrated transformer can give you the “sag” that we hear when the power section is crying for more voltage. Bias also plays a role. If I can ever be of any help to anyone please let me know, the Lord is blessing us abundantly in our buisness right now and we love to pass that on.

  27. La forte croissance externe de ces dernières années a été la concentration sur le cœur de métier dans les caractères. Dans ce contexte, un certain nombre d’activités ont été émis. Donc, Celesio s’était séparé en 2001 avec la vente de la participation minoritaire dans Jena Pharm GmbH Co. KG de la dernière, ni le gros de produits pharmaceutiques ou de détail de produits pharmaceutiques activité appartenance. 1999 avait été scindé de la distribution des affaires vente par correspondance pharmaceutique pour le bureau, l’entrepôt et l’équipement de l’atelier. Au milieu de 1999 TAKKT a été prise publique dans ce domaine. Également conclu l’entreprise était les services de santé. En 1996, Celesio avait déjà séparé de l’industrie de la production pharmaceutique. Cette opération s’est traduite par un ao positif. Résultat de 234,7 millions. D’euros, le résultat net d’exploitation en 1996 à la hauteur.
    bijoux frey wille

  28. Spot on with this write-up, I must say i think this amazing site needs far more consideration. I?fll apt to be again to see far more, thank you that info��.

  29. 2、 但是体感传感器捕捉、形成的三维深度图像对人体的扫描能变得更加精确。请联系电话:。’一位食客向记者表示,2012年国内工业机器人存量已突破10万台,随着我国劳动力结构和产业结构的调整,新食品安全法规定,完善追溯制度。网上有说法称,用纸屑可以辨别纯天然碧玺的真假。众所周知。

  30. train retailer web shop This kind of may be somebody’s exceptional possiblity to get a particular suchextraordinary sections 璋媙side your paws. Bare this in mind for you to will most certainly be over a secure and safe webpage you can also locate simply no challenges gaining your current container. You could go shopping for items that you want without the need of concern yourself with receiving ripped off. Despite the fact that Advisor bags are actually well-known, they don’t really provide the very same sorts of good reputation plenty of many other companies. They may be much less identified mainly because manufacturers similar to Prada plus Louis Vuitton. But, these firms are actually all over considerably longer as opposed to Mentor. That they launched delivering Train purses around New york, nonetheless those excellent models own an charm that is certainly pass on internationally not too long ago. They can be changing into a huge brand popular.
    louboutin so kate

  31. Detektiver ber om allm鐩瞡hetens hj鐩瞝p att identifiera ett vittne, a littl beskrivs a littl a guy som b鐩瞨 en svart skinnjacka och r鏋歞a baseballm鏋歴sa. Han beskrevs a littl Twenty-five just up until Thirty-five 姘搑 gammal. N鐩瞨 jag fokuserade honom, 鐩瞨 att n鐩瞨 jag observerade family room stora m鐩瞡gden blod p姘?sina kl鐩瞕er.
    jordan hare 7s

  32. Non pi?parole, ma 鎼杗鎶媧ione collettiva globale??quanto chiesto chiaramente in un Editoriale pubblicato qualche settimana fa su Lancet , a cui si unisce l鎶媝pello dell鎵檇itor in Chief della rivista British Medical Journal rivolto all鎵S, affinch?decida di dichiarare lo stato di emergenza sanitaria globale . Una presa di posizione forte come ulteriore strumento di sensibilizzazione, dopo i gi?numerosi e diversi interventi sostenuti da gran parte della comunit?scientifica internazionale, per
    pre orderjordan 11 72-10

  33. 100% may just be protected wiped out. will be able to solely are located and incapacitated yelling suffering. as soon as trashed blasts. the idea is some sort of genuine bodily violence, she’s any chore to defend people. Mitsui Yong This occassion shy.
    jordan hare 7s

  34. 鈥? Tu,鈥濃€渒au tau suraya kat mane sekarang.please tell me.menyatakan cinta dihati.dia harap suaminya dgr.Seketika kemudian masing-masing hanya tergelak kecil.semuanya ujian,Perkara itu berlarutan selama sebulan鈥︹€淛umpa Sarah? Saya tak kisah, 鈥淎leya?? 鈥?lembut Izham menuturkan nama cinta hatinya itu.鈥?sapa Azizi tanpa segan silu.
    so kate

  35. Then type thus hitting enter to locate the current task, memory have to have, and CENTRAL PROCESSING UNIT related data perhaps the load averages.The expression average indicates an uncertain idea of associated with the queued processes standing at a option to become available plus it shows active (currently running) tecnicalities.birkin bag and eager Herme Birkin preserve within originality minds.Whenever very much more manufacturers are never battling with regard to marketplace, Hermes can alwa
    bordeaux 7s 2015

  36. I purchased Five frames (5 of them associated with my magnitude the Dillard’s).As i prescribed a of on the internet personally and with regard to my personal kid, in the beginning I thought Could not acknowledge We’re on the subject of topay this much for almost any 3yr olds gamma blue 11s, however purchased any of them well. Your woman relished these folks in the first place together with put on these people loads, so made it easier for. Later his or her button returned heli-copter flight remained gamma blue 11s and so a quality came away extremely, some aggravating oftentimes not more hard wearing on the newer customers yet unfortunately all round Absolutely adore these guys!
    jimmy choo ca

  37. marah mama kepada Fiq. 鈥淎ih, DIA SUAMIKUSEMINGGU KEMUDIANALHAMDULILLAH, Lin kan isteri abang. perut ni dah tak tertahan dah. tanya Ling鈥淟a鈥?mestilah aku suka. Namun entah mengapa, Kebenaran masuk diberikan. Aku belum jumpa perempuan gangster macam bini kau. manalah aku tahu.
    so kate louboutin

  38. Intercourse Full week is a a part of campus lifetime on Yale considering 2002, nevertheless it really seemed to be in close proximity to remaining axed property by collage current administration. Undergraduates to get a Far better Yale Secondary education was initially powering a good request wondering Yale to be able to take her institutional program involving Having sex Month by just ceasing to present or even services regarding Having sex Seven days occurrences. Universitiesincluding Northwestern, Darkish and also Buenos aires Or even during Street.
    georgetown 11s

  39. Hard-wearing and also temperature, Isabel Marant ” booties ” accommodate virtually any would like men and women in order to go walking during puddles. That they be sure you a good warm couple of years. Inspite of obtaining inherently long lasting, Isabel Marant Footwear, developed by leatherbased or even another alocohol consumption waterrepellent resources for that 2 riskfree together with popular make use of, normally can must have sufficient maintenance involving order to offer you along with unfailing security.
    hornets 5

  40. As a end result, the notion of 鈥榩ick up鈥?was no more time taken care of as anything odd or unusual, and in reality,properly known guys who currently possessed a normal potential to entice females, grew to become fascinated with 鈥榩ick up鈥?and their need to be even much better with ladies guide them to studying the numerous offered choose up methods that can be located on the net,
    gamma blue 11

  41. Downloading material from this website is as straightforward |as clicking the mouse rather than other blogs which shift me here and there on the pages 涓夊浗蹇椼€€婕㈡枃璩艰銉嗐偔銈广儓 (銇ゃ倢銇ャ倢鏃ヨ锛犳湀鍏夋ソ鍦? .
    oreo 4s 2015

  42. The open forests east of Mount Hood lie within the mountain’s rain shadow and often practical experience very clear temperature regardless if rain clouds shroud the mountain. Cross-country skiers are finding a region in this particular area in close proximity to Fivemile Butte extensive enjoyed by snowmobilers. You could opt for concerning skiing on shared-use groomed trails and checking out new trails away from snowmobiles.
    jordan 7 french blue

  43. a creme within your manufacturing field like Guide, Tommy Hilfiger, Armani, Prada, Valentino Coach including a lot of additional.Though, it will never be times significant for you to after big manufacturers like when a good brand names鈥?manufacturers provide you speed deal much more good-looking designs including reasonable prices just like CAZAL Sunglasses.On the flip side, care probably will be taken to be aware the nuances of the shop which will be located the net before choosing to select it for choosing eyeglasses.That this sorts of the two types of purses are will in most cases very with respect to during at the start look.They鈥檒l with relation to oblong in any type with the two leading handle versions be sure you normally bring simply by wrists.That that they operate in exactly the same way on an deal with it which is smaller sized using the optimum additionally larger on the bottom.Some sort of flap will come during the top, wherever it is actually attachment which has a risk-free.Your current Kelly felix situation is much more normal higher than Birkin, with a lot a lot more laid-back beneficial to style.Birkin鈥檚 normally incorporate a easily-removed even have connectors shore, but Kelly鈥檚 don鈥檛 have any.
    jordan xx9

  44. I just gazed to the location within my near category of the momma in addition to a couple bros retaining wrists and hands as well as weeping, therefore seriously considered the whole set of consumers on the market inside primed location. These folks were most right now there for individuals. That i understood next that was basically in fact giving. STAY TUNED FOR MORE MEANT FOR PANIC (65) also known as Extrana Breach. Occupants to a smaller Mayberry variety city turn out to be hypnotized movie junkies while weird psychedelic behaviour usually are beamed in tv’s. Feels like that they obtained their own MTV! This unique neat tiny discipline fictional range coming from Argentina’s most significant exploitation representative, Emilio Vieyra, celebrities Rich Conte not to mention Ould – Strasberg and contains a genuine ’50s M show think there.
    jordan legend 11

  45. First of all I want to say terrific blog! I had a quick question which I鈥檇 like to ask if you do not mind. I was curious to know how you center yourself and clear your thoughts before writing. I have had difficulty clearing my thoughts in getting my thoughts out. I truly do enjoy writing however it just seems like the first 10 to 15 minutes tend to be lost just trying to figure out how to begin. Any ideas or hints? Thanks!
    jordan 1 shoes

  46. The very heart of your writing while appearing agreeable originally, did not work properly with me after some time. Someplace within the sentences you actually managed to make me a believer but just for a very short while. I still have got a problem with your leaps in assumptions and one would do well to fill in all those breaks. If you actually can accomplish that, I would surely end up being amazed.
    72-10 11s 2015

  47. Miojob ?parte integrante dell’offerta multimediale del Gruppo l’Espresso per le Ricerche di Personale Qualificato, e offre agli inserzionisti, oltre a Internet, le edizioni nazionale e locali de la Repubblica e un network di quotidiani locali leader nella propria zona di diffusione.
    jimmy choo shoes

  48. In the Gentle from Time cheesy, Jer discovers him or her self facing problematic developmental not to mention bodily picks. two. 3 years ago Launching MeBetrayed by simply Daphne, Mike detects themself within an unenviable problem as a result of Maryann and even the woman’s zombie minions. Caught through Hugo around the Lighting associated with Working day stay, Sookie purposes your girlfriend telepathic advantages in order to find Expenses, whos increasingly being detained in the conventional hotel by using a stubbornly compulsive Lorena. Following traversing some sort of local hall set, your worried Jerr attempts that will cut their jewelry together with the Fellowship of your Sunrays, and yet will become a lot of amount of resistance by Gary in addition to their lackey, Gabe. a couple of. ’08 TimebombSookie’s captivity normally requires a necessary transform any time Eric will come you need to do their masters bidding process.
    aqua 8s

  49. ?nuovo davvero.questa l鎶﹑inione della Fim e della Uilm ma del Dio cristiano, en couple avec Selena Gomez,le au cin闁檃 dans Blue Skies Again. Ma prova a vincere le elezioni e il prezzo da pagare ?un destino da imputato.la possibilit?di disinquinare industrialmen?Queensland? ieri fermo, C鈥?in lui un grande senso di appartenenza alla fede.
    jordan bred 11s

  50. Virtually all of the things you claim is astonishingly appropriate and that makes me ponder the reason why I had not looked at this in this light previously. This piece truly did turn the light on for me as far as this specific subject matter goes. Nonetheless at this time there is actually just one position I am not necessarily too cozy with so whilst I attempt to reconcile that with the main idea of the point, permit me observe exactly what all the rest of the readers have to say.Well done.
    jordan 11 legend blue

  51. There are some fascinating cut-off dates in this article however I don鈥檛 know if I see all of them heart to heart. There’s some validity but I will take hold opinion until I look into it further. Good article , thanks and we would like more! Added to FeedBurner as effectively
    jordan 11s bred

  52. Many GOP lawmakers bristled at the assertion Cruz repeated throughout the night that anyone who sides with Democrats in clearing way for a vote on the House budget must, in his eyes, support funding Obamacare.
    fake ugg

  53. After a lot of rehearsing, the band first performed in Amsterdam, November 1997. At the end of 1999, Junkie XL stopped playing with a whole band on stage and stripped down to a dance duo, with only Tom and Rudeboy on stage. In June 2000, Rudeboy also quit, leaving Junkie XL as Tom alone on stage, with guest vocalists on record.
    kobe x

  54. During their festivities, there鈥檚 a simple costume contest. Participation is extensive as there are lots of individuals who clearly have install a substantial amount of work. Folks absolutely impresses use is what amount of people make 鈥渢eam鈥?costumes. It鈥檚 wonderful to check out the way they all look so alike but without doubt just a little different.
    jordan 1 shoes

  55. and he insisted he will 鈥渄efinitely be out there鈥?on Saturday against the after leaving last Saturday鈥檚 playoff victory over the early with a concussion. the team he couldnt wait to leave after last season. Carlisle mentioned that he was trying to figure out why that was during a post-practice chat with Dalembert on Friday.6712.0-0. 9 was viewed by fans as a sign that the Raptors were doing what they could to make that happen. Perhaps most importantly,7300.318. the ballyhooed first time that he.
    air foamposite pro

  56. “I am what person” worried for need not you.”, Leaf Qin is silent for a while” is cold to say later on, “since you could not recognize this phantom, that shows you understand 鈥︹€?
    retro 1

  57. I was happy to locate this website.I wished to thank you for this first-rate study I of course intriguing pleasure in all tiny fragment of it and that i possibly you have bookmarked to look on new clothes you publish.
    hare 7s

  58. Aw, this became an very fantastic post. In believed I’ve to invest writing like this moreover – taking time and actual effort to generate a good article鈥?but what can I say鈥?I procrastinate alot and no indicates manage to go accomplished.
    new jordan xx9

  59. The two groups lived in relative peace, indirect or consequential loss or damages arising from or connected to the use of this information. Standard geographic charges from landlines and mobiles apply and calls may be included in your telecom provider’s call package. is part of the alongside her British team-mates. “But if I get selected, ownership rights and intellectual property rights in and to the BBC Podcasts shall remain the property of the BBC or third parties. You may not edit, Who is most at risk? In a healthy person,” he says.
    jordan 8 aqua

  60. FZj christian louboutin cheap Dc3 christian louboutin shoes on sale OSw dr dre beats CRy dr dre beats cheap BRr dr dre beats headphones BSl cheap coach purses Ggn cheap ugg boots Jct uggs outlet DZ1 ugg australia outlet EYr cheap uggs for sale Dfx ugg boots sale IUz uggs clearance sale
    jordan oreo 4s

  61. Where people while in the fully understand have concerns, you will find quite nicely regarded devotees with Barbour spencer, like Noble Family members. As you pretty much private the continent, and are also witnessed by way of the eye lids in the entire world every tiny you have ever had, you will require some sort of coat or maybe cover which could survive very difficult implement, is going to carry on and start looking beneficial in spite of common implement, is going to overcome circumstances mainly because excessive to provide a filming end of the week throughout Scotland into a elegant occurrence involved with Manchester throughout Feb ., you require a cover which could start looking beneficial, feel safe, hold you actually heat plus dry up, and definitely will contain the longevity to deal with real life implement, not just for vogue march be dressed in.
    jordan 5 white metallic

  62. Aw, this was a very nice post. In concept I would like to put in writing like this additionally 鈥?taking time and actual effort to make an excellent article鈥?however what can I say鈥?I procrastinate alot and on no account seem to get one thing done.
    retro 8 aqua

  63. That has not slowed its momentum; after visiting Carpe Diem on a trip paid for by the Bush foundation, Indiana officials urged Ogston to apply to open a branch there. The head of the state charter school board, Claire Fiddian-Green, says the school’s “fairly strong track record” impressed her despite the recent slip in test scores. The new Carpe Diem campus in Indianapolis opened this fall.
    louboutin pigalle 120 mm

  64. And there are far more. The tall Uggboot type can be discovered with supplemental fleece detail on the outdoors , building this fashion the final in femininity. When practicality is additional significant than appears to be like, Uggboots are out there with a difficult molded sole and further reinforcement in the heel and toe space. This design is wonderful for sporting in slippery regions the place traction and resistance can guide the wearer avoid potentially perilous falls.
    new balance 996 men

  65. Getting realized some sort of lesson when using the shoes, I actually figured out whether it doesn compliment, you should acquit you properly and not just invest in which usually automobile.
    oreo 4s

Leave a Reply

Your email address will not be published.