I bought an old pioneer kp500 super tuner. I know red us got-black is getting and gray/green are speakers. But what is the other connection wires that come out of top Bback? What amplifier out equalizer model did this naturallt fit into?
I just reread my post and saw some words were garbled. Yes, its a kp500. The back has 2 sets of wires. One bunch coming out from bottom right has a black, red, green and gray. I know these are ground, hot and speakers. Bout the is another set that comes out from top of back. Threes are part of female capsule and connects to something. I wish I could post a picture here but not sure how to do it.
It appears that there were 2 versions (at least). The only photo that I could find showing the cable showed a normal din sized plug. If that's what you have, maybe someone here can tell you which components used that small plug.