My first impression of the PEQ-503s (with DOA and Xformer) is that they are very well built. Pro. The EQs do impart a slight coloration, in a good way. The low end is beefy and the air band is very nice. I'm using them for subtle boosting on the main stereo bus. The air band is best I've heard so far in my travels! - posted on Gearslutz
Thank you for the wonderful kit. I have just finished building 1 preamp board and 1 PSU board. Your directions and organization of parts was fantastic. Thanks again for putting together such an easy and fun to build kit.
I don't have any experience building gear, just soldering cables. So when I ordered your SC-1 kit, I didn't know if I could do it or not. But your PDF guide (great read BTW) made the process easy to understand and has been a great help for a newb like me. And the best thing is I couldn't believe it worked! I'm impressed (not only because it sounded very good) but the fact that I built it myself. ME! I built this thing! And it was not as hard as I thought it will be. This project has opened up a new world for me. Now, I want to build your other kits. Thanks again.