My Gemini is just a DJ mixer with 2 turntable inputs, CD, one microphone but this is more involved that mine and I've got a Peavey MD-16 too. I was pointing out that for it's age it's still pretty versatile for someting like mixing a small gathering or some guitars...it was likely meant to be an accompaniment to a Pioneer home stereo like SX-525 to 1010 to use with an RT reel or CT cassette deck. In that respect it's pretty nice.
I'm pointing it out...as much as it interests me I'm not even attempting to ask FOR it etc...I am just pointing it out as it isn't so common in my opinion and it's neat to find Pioneers I've never seen. But YES, it would actually have a use for me.