no schematic?

And D1 appears misplaced.

Not sure why, if you don't want to have a compressor stage, you left the CA3080 in there.  You should probably just have a simple buffer using the 2n5487. Better yet, go ahead and put the compressor in there, since it's a great feature of the amp.

Thanks!  I posted that edit in my first post, just before you made your comment.... 

What's your reasoning as to how separate power supplies (pre and pwr) affects the sound?  Not surprised that it does, but can you explain how?

And I am definitely interested in the OTA model if I can use it for SwitcherCAD/LTSpice.  I will probably try to use the 13600 to emulate that little distortion circuit.  I am very curious about it.  Will PM you...

Hi new poster here.  I have been looking at the (Moog/Gibson) Lab L5 amplifier schematic (here it is) and thinking about why it gets the rave reviews that it does from guitarists.  As it happens, I bought one in high school but had to sell once I went off to college.  Sad.  Now I would like a similar sound but at apartment levels, not the brutal 100W volume levels the L5 could achieve.

My guess so far about the reasons for its excellent sound (and why even tube amp purists acknowledged the tonal quality of this amp) are thus:

(1) the "multifilter" feature, which had grouping of fixed hi-end boosts mixed in to the signal; probably an attempt to accommodate keyboardists, but almost certainly the thing that made this the favorite amp of Gang of Four and BB King (!).

(2) the power amp, which looks like a Class A, John Linsley Hood type of amp, on steriods.  Right now I am thinking of using a much quieter (5-10W, still very loud) power amp like this one.  As a substitute in my homebrew. Not a fan of chip amps, me.  No offense.... 

EDIT: Sheesh, looking at it again, and reading teemuk's comments on the L5, seems I missed that it is complementary and not the traditional "class A."  Nevermind on that one....

(3) the "parametric" filter in channel two.  That thing is purdy...

(4) that downright bizarre transconductance amplifier after the mixer stage, but before the compressor (the now-obsolete CA3094).  What the hell is that thing for?  Distortion, maybe? 

(5) Reverb driver.  The tank appears to be driven hard.  So much so that the make-up gain for the reverb output is only 20 dB.

Would love to know people's thinking on that, as I get set to emulate this in smaller scale.