Right... Just starting to put the puzzle together in my head
If attempting to run a 4 channel amp which will be required to power the 2 front speakers and rear sub....
Could you not connect the RCA converter from the rear speaker for an input if your going to ditch the rears anyway and only having to run the REM from the back of the head unit
Doing it this way, if possible! just seems alittle easier as you'll only need a small amount of RCA cable which will be kept in the boot and the only cables running from back to front (Apart from Power Cable) will be the speaker wires going to the fronts
Or am I just missing the bigger picture
Cheers
Tee
Hello Tee....
this is a fairly big question you have asked so i will try my best to answer over the forum.
your standard HU has 4x outputs..
front right
front left
rear right
rear left.
now what (i think) your asking is if you can get your rear speaker input and use them for both front and rear speakers?
this is not possible as you need your front speaker inputs if you want to also run a sub.
you have to get the front speaker outputs from the HU and wire this to the amp, this will give you the 2 front component amplified signals.
for the rear speakers that will be used for the sub signal..
you can use a hi-low converter and put this as an input in the amp for the sub. this can be kept in the boot if desired. (when i did my install i found it would be much neater to have the 2 hi-low converters under the dash and then have the rca cables going to the amp.)
i would advise you not to try and cut corners too much. Car audio is something that is simple but very complexe. you have lots of issues with earth loop feedback, incorrect impedance, resistance issues etc.
if you can do it right the first time, you wont ever have to touch it again, if you try and skimp then you will have many noise issues if you are not careful.
i hope this answers your question. if not drop me a PM and i can try and explain further