Hi guys,
I've been scouring the interwebs for someone else's hard work in a solution for installing an aftermarket head unit while retaining the factory DSP amp and speakers. One method was to splice the factory radio into the DSP, leave it in the trunk. Didn't appeal to me, and I looked for a cleaner solution without luck.
I've developed a plan, could you guys check my work below and let me know if I've missed or misinterpreted something?
Here are the assumptions:
- The car is a 2006 Z4M
- The car is not equipped with a OEM CD changer
- Aftermarket head unit will be an Alpine ILX-F309 "Halo9" with the following RCA pre-outs: 2-channel Front, 2-channel Rear, and 2-channel Sub
- We are keeping OEM DSP amp, and speakers
- We don't want to splice in a factory head unit and keep it in the trunk
1. The biggest issue seems to be the DSP's input is a RG174 coax cable rather than the standard RCA pre-out inputs you find on aftermarket amps.
2. As such, virtually no aftermarket head units have coax pre-outs. So we have to convert the RCA pre-outs to a coax signal/connector.
3. Grom Audio sells a DSP adapter (
link) that converts signal from a 6-pin connector to coax.
4. We cut the RCA pre-outs on the Alpine HU, pin it out to a matching 6-pin connector on the Grom unit, which gives us a coax connection to the DSP.
So my question is... Is my plan sound? (pun intended). I'm not an electrical or audio specialist, so I don't know if the differences are just the connections or if there is a difference in signal as well.
Please advise, interwebs! Thank you!
