Do I need an RCA spliter?

[temuchan 10+ year member]

Hey, I am going to be bridging a Rockford Fosgate r300-4 amp to make it do 150x2 @ 4 ohms. My head unit has 2 sets of RCA outputs and a sub woofer RCA output. Can I just run two sets of RCA cables, one to the front channels and one to the rear channels, or do I have to get a splitter and only run one set of RCA's?

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[Plutoman 10+ year member]

Hey, I am going to be bridging a Rockford Fosgate r300-4 amp to make it do 150x2 @ 4 ohms. My head unit has 2 sets of RCA outputs and a sub woofer RCA output. Can I just run two sets of RCA cables, one to the front channels and one to the rear channels, or do I have to get a splitter and only run one set of RCA's?

I'm not sure what you're splitting it for - but you are bridging it to two channels.

You will only need one set of RCA's, and not even a splitter. From one set on the HU, to the amp.

 

[temuchan 10+ year member]

So I would run one set of RCA's, and would I plug the left one into the front channel, and the right one into the rear channel to get a left/right setup instead of a front/rear ?

Basically I know how to run the speaker wires to bridge the amp down to two channels, but I don't know how to run the RCA's to do that.

 

[SicAudio 5,000+ posts]

use the front rca output on the deck to the front input on the amp.

 

[drpeeb 10+ year member]

So I would run one set of RCA's, and would I plug the left one into the front channel, and the right one into the rear channel to get a left/right setup instead of a front/rear ?
Basically I know how to run the speaker wires to bridge the amp down to two channels, but I don't know how to run the RCA's to do that.

I don't know your particular amp, but I think you need to run one RCA cable with two Y splitters at the end of each side, each side meaning L and R.

I'm running an iPod into a new Alpine PDX-5 amp, and there's no setting on the amp to tell the sub-woofer channel to get its signal(s) from the L and R front signals being input. I had to use two splitters, one so I can input the left signal to both the front-left and the sub-left, and one so I can input the right signal to both the front-right and the sub-right.

If there's a better way, I'd love to know it ...

 

[KyleBechtold 5,000+ posts]

with my alpine amp mrp-250.. when i bridged it I put it on my front speakers.. alpine says you have to take your L and R rcas and stick Y splitters on the end and put them in all 4 rca slots on the amp..

 

[drpeeb 10+ year member]

use the front rca output on the deck to the front input on the amp.

I think that will only work if his amp has a setting to tell the sub channel to get its signals from channels 1 and 2, sometimes also called front-left and front-right.

 

[SicAudio 5,000+ posts]

i assumed he was using splitters still so to clarify use splitters so you have 4 rca inputs to the amp.

 

[temuchan 10+ year member]

The amp is a Rockford Fosgate r300-4, and I will be running a set of Polk Momo MM6 comps with it.

My head unit has a sub out, and two other rca outs (I assume a front and a rear)

 

[drpeeb 10+ year member]

The amp is a Rockford Fosgate r300-4, and I will be running a set of Polk Momo MM6 comps with it.
My head unit has a sub out, and two other rca outs (I assume a front and a rear)

Ah, OK ... Since your HU has a sub out, I'd probably run two separate RCA cables. That way you can independently control the sub with your HU with whatever sub controls your HU has built into it (assuming it has like level, boost, etc.).

 

[temuchan 10+ year member]

Ok, yup my HU has treble/bass/bal/fad/sub so I can control the sub independently using that. I'll try running two RCA cables, if that doesn't work I'll come back here.

 

[drpeeb 10+ year member]

Ok, yup my HU has treble/bass/bal/fad/sub so I can control the sub independently using that. I'll try running two RCA cables, if that doesn't work I'll come back here.

It will work! If it doesn't, something else is wrong!

 

[Plutoman 10+ year member]

Well.. you're only running the fronts. Which means you only need the front two RCA's, and you'd run each side of the fronts to each channel.

Which is one RCA cable. Well, try whatever, but imo. Second RCA cables never hurt for a second amp anyways.