I agree pretty much what Kegger has said. In my own listening experience when altering the feedback resistors (R7 and R8) on the VTA standard gain board which I always take off the 16 ohm tap, I have found that anything between about 3.5K and 10K is OK (to my ears). If I go below 3.5K the VTA driver board tends to make the amp sound "harder" and less tube like. If I go above 10K the bass starts to lose a little definition. The 7.5K taken off the 16 ohm tap IMHO is a good compromise - the amp has that smooth tube sound yet the bass is not sloppy.
Bob
Bob
