Hello,
I have a used Dynamic Processor for sale. It lights up, but I can't hear much difference in sound reproduction when run in the system. If someone wants to play around with this, I'll let it go for $20.00. I am located near downtown NPR. 727-236-5552
Here is a link to the service manual if you are in the mood for a little light reading.
http://www.hifiengine.com/manuals/pioneer/rg-60.shtml