semcoinc,

I bought a used E53 factory sub off of eBay and modified the connection terminal to accept 2L and 2R connections like a standard speaker box. For the amp I just spliced into the rear door speaker wires and ran them into the high/low inputs of the amp, so I'm not using the RCA sub output from the Eonon unit. If I had a good sub like the JBL Stealthbox I would probably do something better, but the OEM E53 subs don't put out enough to warrant the work of tearing up the interior to run an RCA from front to back.

Can you just add an RCA splitter?