I am in need of a Sunn Stage Bass schematic. Picked up a 115 combo for $50, and was running a speaker cable from the head section out to the cab input, not knowing that the head was already internally wired to the speaker (amp would not produce sound without the speaker cable in between). Sounded great for about 30 minutes and then the sound died off. Had this problem before with the amp, but was always able to get it to produce sound again. Now it's just plain ol' dead. After taking it to my dad, who works on amps and guitars, there were no obvious signs of damage so we need a schematic of the amp or something similar to do a full troubleshoot. Thanks!
