These questions pertain to a Fender Capricorn amp. Fantastic clean sound and great reverb. It's from the rare, early seventies solid state zodiac line and has three jbl's. Here are my questions: 1. Anybody familiar with these amps? 2. My father wanted to run a different head through the speakers and mistakenly connected the out of the head to the speaker out of the Capricorn. Now the amp does nothing but hum loudly when turned on. What could be blown? Power transformer? Sorry. No pics because my camera is down.