Rowe MM1 Jukebox Schematics or advice

I have a Rowe MM1 Jukebox I'r repairing and while I get ample midrange volume the bass seem very weak I'm hoping that somebody can help me with a schematic or advise me on how the single woofer is connected to the stereo amp in this style amplifier ( Transistor with output transformers) . Alst there are about 15 or so output wires from the amp that tie into a harness that I'd hate to need trace and would appreciat any help in understanding what they are for The unit is labeled "video Ready" Thanks in Advance Bob