Got my hands on a WS-90DJ mixer from the dark corners of our church's storage spaces. It's all phono/RCA jacks for input/output, it has 5 channels - for a DJ mic, 2 CDs, and 2 tape inputs. Each channel can be switched between either of a pair of inputs. There's a 5 band master EQ. It appears to be made by "electro Vision". Top side Back side I have no idea how old it is, but it still powers up. At least 2 channels work, didn't test the rest. It hisses like a snake, but the sound is pretty good. I think the hissing is just the headphone output - it doesn't get louder when boosting the volume. It's not needed for anything but I've opened it, and looked around to see what's what. Looked at the EQ circuits, headphone amp... fantastic. I think it was all hand-built.