This will hopefully improve the front speaker audio and will also allow me to connect the amp via xlr cables which my receiver cant do alone. The audio signal input from channels 1 and 2 will then be equally distributed to channels 3 and 4 as well.

Bak82bl Blue Complete 8 Gauge Amplifier Wiring Kit With 2 Channel Rca Cable Cca Wiring
How to connect rca cables to amp. There are several other names for this small yet incredibly useful cable including phono connector or lotus plug. Your amp probably does not have 2 inputs one of the pair is most likely an output. Then run a seperate pair to the rear amp comming from the rear rca outputs on the hu. You must match amplifier rating with your speakers. Pyst short rca cables. Youll need a stereo pair to connect your preamplifier to your amplifier.
Determine which kind of cables you need then use the following links to purchase them. I would run a pair of rcas from the front rca outputs on the hu to the front speaker amplifier. If the subwoofers line in uses rca cables and if the subwoofer out on the receiveramplifier also uses rca simply plug in using an rca cable. If the cable is split on one end a y cable for both right and left channels then plug in both the r and l ports. Say your stereo only has one pair of outputs but you want to connect to a 4 channel amp with 4 inputs. The amp abbreviation usually means audio amplifier and said amplifier usually has audio inputs with rca connectors or optical input or rarely 35mm headphone jack audio input.
Audio cable types rca cables. Developed in the 1940s it has remained largely unchanged since and continues to be one of the standard cables for linking audio components. Connect your one rca cable to channels 1 and 2 on the amp. Rca is one of the most ubiquitous cable formats in audio gear. For music i will run the toslink from the airport express directly to the xda 1 and then xlr cables directly to the amp. Having the top rca cables are very much important to date for connecting audio devices.
They came out back in the 40s and since then have been used all over the world with various set ups. Switch the input mode on the amp to 2 channel. As above most equipment uses rca cables but some uses xlr cables. This cable is used for everything from cdjs to mixers to main outputs to stereo systems.