Anybody know where I could get my mitts on a manual for my "new" trace ah500x? The amp is like 20 years old, and has some features that I would like to know more about. It's bi-amped 2x250watts 4 ohms each channel, also can be run bridged at 500 watts (presumably 8 ohms?), or stereo full range 2x250 watts at 4 ohms each (I haven't figured out how to get it to do stereo yet, no sound). What kind of cabs and set up should I shop for? This amp is a beast, very very loud.