Just started this project. I got this 2285 from the original owner and I am the first to service it. It actually sounded ok at lower volume but definitely in need of cleaning and service. I started on the pre amp board PE01 because I had purchased some Sparkos Labs BA312 upgrade op amps built specifically for Analog Esoteric. I wanted to get this board and those new op amps just right before moving on to the rest of the unit.