Looking for Premier Audio Subwoofer Schematics

Someone gave me a premier audio subwoofer to repair. Of course, no manuals. The easy stuff is now repaired, but we aren't at the finish line yet. Does anyone have a collection of schematics for the old Premier Audio line of subwoofers? Sorry I don't have the model number handy...but the amp has about +/-55 Volt rails, and 4 power output devices.