How would I connect a subwoofer without a dedicated rca output?

Question

The head unit only has front R & L and rear R & L RCA outputs and no dedicated Subwoofer output. I have a 4 channel amp with the RCAs to drive my front and rear speakers. Now I have a SVC 12" subwoofer and another amp. I connected a power distribution block but I'm not sure of the best way to split the RCA if that's what I'm supposed to do.

Answer 1

you can either use y rca adapters from the front or rear rca's or you can even get a line level converter which converts speaker level outputs to rca and jump that off of either the front or rear speaker outputs on the amp . i would recomend the first option

Answer 2

They  sell RCA splitters, just split of the R & L rear and run that to your woofer amp. Easy as a pie.

Cheers

B

Answer 3

Well, if you simply split the rca's on the rear channel, it will work.

The best way in your situation is to check your 4 channel amp to see if it has a pre-out. Usually a decent 4 channel amp will have 2 sets of inputs for front and rear, and 1 set of pre-outs. If it does, you can just run a set of rca's from there to your amp.

The thing you want to be concerned most about is the crossover. Some 4 channel amps will have a built in crossover dedicated for the pre-out so you can designate that pre-out for a sub using the built in low pass filter. But just be sure to adjust your sub amp's crossover to around 100hz to make it sound nice.

If you dont have a pre-out on the 4 channel, you can also use a line driver, (like stated above with the speaker wire) as this may be your only other option.

Good luck@