You know Wayne I took the stepped attenuators out of my Foreplay; it was hard to get a good balance of output. The Gainclone can use either the 3785 or the 1875 chips. I used a toroidal transformer and hexfred rectifier diodes with Black Gate Electrolytics as a power supply. It can sound a little harsh on the real high freq. if you push it. With the Pi Theater 4's It never runs out of steam and very surprising how musical this thing sounds. If I ever get delivery of all the parts for the Death of Zen pre-amp I will report on that combination. What a pain gathering parts; something to be said for kits!