Dj Preamp

What are the "play out" ports on my receiver?
I want to use my receiver to control volume and high / low of a signal audio. I put the entry that says "Input" (RCA red and white), and then "play out" ports to lay a cable from there to my amp dj. I get no sound. There are no speakers connected to the amplifier (via speaker cable), why I can not use it as a volume control (something like a pre-amplifier, I guess)?
The work on the receiver is in the recording, hook up a tape recorder in order to use the amplifier before you have your receiver to have a preamp output connection (some receivers will have to take a look at the volume of manual works only with speakers that do not control the recording output is set to adjust its sensitivity is not the amplifier in the recorder … The receiver will work according to how it was designed not as you want.
UAD 8110 & 4110 Precision Channel Microphone Preamplifier
Tags: audio, dj preamp, dj preamplifier, hardware, music, preamp, recording