So i have my "blue tube" rack preamp hooked up with a cheap amp i pulled from a Crate combo with a blown speaker. I was playing with the volume low on the amp, but high on the preamp to the point of a pleasant distortion. After a while, when i dug in, i got a bad distortion (i imagine it was clipping). This happened a couple times, and then my sound cut out. The amp worked, but the preamp did not. The lights were on, but even when i muted the preamp, i didnt get any sound. I tried using it 30 minutes later and it worked. Any clues on what happened?