Yep, I concur with what lonewhitefly and others have said. The Sansui is a home stereo unit. I remember when things like that were all the rage in home receivers and amps, but very gimmicky IMO. They don’t measure up to even the cheapest digital reverb. I would even use a <gulp> plugin reverb before I’d mess with that Sansui or similar… and I don’t generally use plugs.
For reasonably priced vintage spring reverbs that are designed for studio use look at the Furman RV-2, Fostex 3180, Orban 111, or Tascam RS-20B. They are a bit dark and muddy IMO, but that’s the nature of spring units when you get a lot going through them. I’m partial to the Tascam model if I had to have a spring unit. It has a switchable 200 Hz highpass filter -- very useful. Really a bit torn between the Tascam and Furman.
But… I haven’t used springs for recording since the 80’s and I don’t wanna! I understand the draw to go all analog, but even the die-hard analog aficionado I am I think digital does a great job with reverb. That’s one thing it does really well. IMO a vintage digital unit would be a better option than a lot of the new made in China junk, which aren’t really any better than cheap plugins.
I’m partial to 80’s/90’s made in USA Lexicon and Alesis units. Get a Lexicon LXP-1 and be happy. They sound great and are very simple to operate. Others I have in my arsenal:
Alesis MidiVerb II
Alesis Quadraverb 2 (V2)
Yamaha SPX90 (don’t use it much anymore)
"If you can’t make a hit record with a Tascam or a Fostex,
then you’re not going to able to do it with a Studer or Otari!" -David Mellor