Newly arrived is a Pioneer SX-5 Receiver.
The SX Series was the last of the vintage series of quality from Pioneer.
These "champagne" faceplate really stood out on audio shelves. Square buttons are sleek and small. Tuning scanning is driven via the computer controlled LED's in rapid consession. Cool looking and functional. The SX-5 is rated at 30 watts per channel with less than 0.02% THD. Very modest for the output it produces. This look turned the corner for the modern marketplace of receivers. Check out the SX-9 specs at 120 watts per channel, a real beauty. Built in 81/82 this SX series changed drastically from the silver faced 3400 series of the late 70's.