Date: August 16, 2000 at 23:02:18
From: Johny Grenander, [d212-151-57-7.swipnet.se]
URL: GSW
Subject: Re: Motional feedback

I have built one in the 80:s, I used a piezo plate from a piezo tweeter (Coral CH-1). I glued the piezo plate on the inside of the dustcap, the wirez from the piezo plate was thin and soft kind which I connected to a high inputimpedance buffer (TL071) and then to the amplifier. The box must be closed and you will get a deep distinct bass with low distortion. Regards Johny Grenander