I don't think author would give me the PCB design, because he sell it in kit. Anyway I startet schematics in Protel and very shortly I will have PCB. I was hopping that someone on this forum have it allready. Thanx anyway! :) P.S. How can I get lower range of frequency on this amp? It says it will play from 30-20,000Hz. Can I make it from 20-20,000Hz?