Connection between CD, EQ, SP technics

Each unit (the EQ and the Processor) should have left/right in/out rca jacks as well as L/R tape in/outs. The EQ or processor use the receiver's tape loop and then provide a tape loop to replace the one they've used on the receiver.

You plug the first unit (let's say the Sound Processor into your receiver/amp as if it were a tape deck (Processor's outs connect to reciever's tape ins (play) while the Processor's ins connect to the receiver's tape outs (record).

Then you chain the EQ off the Processor in the same way (EQ outs connect to Processor's tape ins (play) and EQ ins connect to the Processor's tape outs (record).

Last you connect the tape deck to the EQ as follows. Tape deck outs connect to EQ's tape ins (play) and the tape deck ins connect to the EQ's outs (record).

This will put both the Sound Processor and the EQ in the receiver's tape loop. In order to have all the receiver's source signals routed through them you may have to engage a Tape Monitor switch or button somwhere on your amp which will route the tape loop to your speakers.