My database is woefully lacking in details about Superscope but I show that amp as having 10 watts RMS per channel.
Many of the Superscope goodies did have attractive displays.
I would rate the Superscope goodies as mid-level offerings akin to Sherwood and Kenwood.
10 watts may not be much but for some listening purposes that is more than adequate, especially with efficient speakers.
I bought a cheap Technics quad receiver just for use in the garage. A cheapo unit may be just whatcha' need for secondary listening.
I'd ask the lister what the controls offer. My database states the unit has SQ and Ambience settings but I can't verify that since I haven't actually seen this unit.
Interestingly, the database tells of a similar receiver, the QR-450 with the same specs: 10 watts, SQ, Ambience. I don't have a date of manufacture. Later dates tend to have better decoders.