[edwyun]

10k? Wow it needs a buffer with any volume control.

Many (including me) haven't had any issues with the ACA but we should always take into account proper impedance matching between pre and pow.

You can use my amps with 600 ohm input impedances any time!

[Folsom]

I'm not saying it won't work, but it could be much better.

[Flyin_V]

The input impedance can be changed by swapping a couple of resistors. For 50K,  R11=47K and R12=330K according to information from the DIY forum. I found the amp to sound a bit on the warm side of neutral.  While the detail was good, it wasn't great. Certainly more than enough to enjoy the music. Seemed to have a lot of grunt for 6W. The faceplate and chassis are very nicely made.  Very enjoyable amp. I'd think it would sound great with Omegas.

[Folsom]

Getting decent input caps on it will increase detail a lot.

[edwyun]

I found the amp to sound a bit on the warm side of neutral.

Same as my experience.