Does the name GainClone ring any bells

Wow, You are the man. Not knowing enough about this piece puts me in the dark somewhat(no pun intended). I wonder if the upgrades you mentioned can be allocated into this amp. It seems with the upgrades the one input and the dual-mono one can have with these kits $100 is about all I will go. Many thanks to you Dark and Gmood for the posts. Stay tuned, Bret

Well, you can easily do the power supply upgrades by either buying a totally new $26 snubberized PS kit (picture)from Brian at ChipAmp.com or you can buy his $29 PS upgrade kit. The new PS kit is really simple.

But there were also changes made to signal/amp board(#2). Here's a list of all the mods from Rev B. to Rev 3:

LM3875 Revision 3 PCB set changes:
1. rectifier board: modified to allow for optional Carlos Filipe (carlosfm) snubberized power supply setup:((100nF+1 ohm) || 100nF)
a. placement created to allow for 10,000uF caps to be mounted under PCB(power supply pcb can be mounted to chassis with 1.5" standoffs if caps are used)
b. added placement for LED with series resistor (can be wired off board)
c. size increased from 1.2" tall to 1.5" tall
2. amplifier board: changed R3 footprint to compact metal film resistor (will still allow for larger resistors, mounted vertically)
a. simplified ground plane, maximizing area by removing signal ground plane
b. optimized connection between the main ground and the signal ground
c. added placement for 0.1uF caps on rails in case the snubberized setup is used (100uF caps would be mounted in the other holes)
d. surface area for power planes has been increased
e. moved zobel network to allow for more contiguous ground plane
3. overall board size increased to 2.9" wide x 5.4" tall before separating components

Most of the signal mods have to do with cleaning up the ground plane and giving more room for large alternate components. Since you probably won't be doing a lot parts experimenting, not a big deal. They probably do not make a huge sonic difference, though the 2c option may make life a little easier for that part of the snubberize PS implementation.

For the dual-mono PS option, you will need to get another of the power transformers that the seller used. Try to use the same manufacturer and model, if possible.

Anyway, you can add extra features to that amp fairly easily and it will be great.

I'm a tweeker by nature and if something can be modded I'm in. A good pwr supply is the heart to any component as you know. If I win this bid I'll probably start with the upgraded pwr supply you mentioned. I still have a soldering iron among my bag of tricks so adding some of these features will be interesting and fun. Keep in touch Darkmoebius.