I had one snag. Even though I was careful the left channel was missing from the Quad 34 preamp, which I like for LP playback in particular. It turned out to be a bad cable from the Quad 34 to the 7706. It was a "good quality' one allegedly. In my opinion cable quality has an inverse relationship to cable cost! I have never had a cheapo RCA cable fail, but I have the higher priced ones.