Ok first off how did you install the radio, remote power to the amp. Did you use an install kit for this or did you hack up the wiring harness.
Did you hook the remote power wire to the radio or did you find a key hot wire under the dash and tap into that.
Power to the amp did you run a wire directly from the battery should be at least 10 gauge wire for this.
The RCA's is not the probelm.