Can I get this amp to work?

[mazeroth]

I recently purchased two plate amps that were found in Polk Audio RT3000p tower speakers. Here's a link to the Ebay auction a guy and I split:

http://cgi.ebay.com/ws/eBayISAPI.dll...732756238&rd=1

To my dismay, when I got the amp there was no gain control on it. There are 3 connector wires coming off the amp: positive, negative, and a 2-wire connector of some sort, that I'm sure plugs into the volume control found on the front of the Polk RT3000p speaker. I had high hopes that this amp would default to half gain if just plugged in but nope, upon powering it up even without a signal it pounded the crap out of my dual Shiva subs! The only way to make it stop was to unplug it. I think I tried turning it off and that didn't help. I don't want to try again to test that theory!

Anywho, do you guys know what I could do? These are very nice amps with dual 15,000 uF caps and 300w RMS ratings for $50 each shipped, brand new. Here is the link to the RT3000p manual if anyone wants to look:

http://www.polkaudio.com/downloads/m...000pManual.pdf

THANKS A MILLION!