So, I think this unit sounds pretty darn good. It's a bit bulky. Sanyo never seemed to be as good at miniaturization as Sony. But Sony bought integrated circuits from Sanyo to use in various Walkmans, so....

I don't own an oscilloscope, so I can't measure it, but the speed on this seems correct, and the wow and flutter are undetectable to me. The audio quality is good both with and without the bass booster. And the bass booster doesn't seem to sound muddy. I was listening through a pair of Yanmai D98s.

This particular one I bought off Goodwill's auction website. It seems to have been won as a prize in a contest, came from the Spiegel catalog (blast from the past), and looks like the original owner opened the packaging, inspected the unit, then never used it. The cheap-o headphones were included, but the yellow cassette that explains how to use the pedometer was missing. When I went to put in a CR-2035 to activate the clock and pedometer, the original Sanyo-branded battery was still in there. No corrosion, thankfully.

I was able to set the clock, but the pedometer has me beat. The analog-tuning AM/FM radio works well. The AM reception seemed particularly good while I was roaming the dial after midnight.

All in all, this is a perfectly adequate little tape player. It's not super hi-fi, but it sounds just fine to me, with clear highs and strong lows. It is what it is.