This is a Sony 5 disc changer from about 1988-89 time frame. I just picked it up in a less than working state over the weekend, found the problem and got it working again. Took some time to demo it myself before it went to it's rightful owner and I gotta say that for a piece of gear that is quickly approaching it's second decade of service, it is a diamond in the rough!
Sony is not very well liked in the audio realms and viewed as a mass-market piece of equipment. Kinda like the Denny's of the audio world. Nobody really likes it but they have all been there at least once and for most, it's a guilty pleasure! I gotta say though that this CD changer will make those doubtful minds think again.
Loaded with a dual D/A converter system and running a 4x over-sampling algorithm, this CD player was clearly ahead of it's time. It's loaded with features that are fairly easy to figure out even without a manual. Transport feel and function is positive and while some buttons may feel cheapy and plasticky, operation is the polar opposite with very well weighted tactile feedback and a solid click to the functioning of the buttons. Drawer operation is a quiet hush and the carousel makes a mechnical gear whine that is barely noticable. It has good clean looks and if you can find one in this kind of condition, the case is nice enough to sit out in the open and not be hidden in a rack. The finish is a matte black plastic face with polished parts for digital display screens and the metal case is finished in a smooth black enamel. Thie is a solid piece of equipment from when Sony made gear that people desired.
Sound quality is very good and rivals some of the best that I have heard. It's far from the best out there but it'd be hard to beat for less than 400 bucks retail now and impossible to find anything anywhere near as good for less than 250. It has two sets of outputs, one variable and one fixed. The variable output wll color the sound slightly and is decidedly different from the fixed output. The fixed output is clean and neutral sounding. Setting up a pre-amp to default all of the tone controls, the cd player has a fairly flat response with lows not as dynamic as the rest of the range and a tad bit of simbilance in the upper registers. I suspect that was due more to the speakers I was using and not the CD player itself. It was not fatiguing in the least and I merely backed off the volume control a tad and it went away.
Overall, if you are looking for a good 5 disc changer that isn't gonna kill your budget, look for one of these Sony CDP-C70's. They are worth the time. I was throughly impressed and now quite jealous of the rightful owner of said CD player!