Do I need a L and R RCA signal going to amp for 2 channels I'm bridging?

[seatown1two 10+ year member]

Title pretty much says it all. Will be taking sub signal from the factory headunit and there is only one positive and one negative wire which will result in one output. The signal is for a sub that I am running off the rear channels (bridged) off a 4 channel amp.

Thanks in advance..

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[JoeK 10+ year member]

Title pretty much says it all. Will be taking sub signal from the factory headunit and there is only one positive and one negative wire which will result in one output. The signal is for a sub that I am running off the rear channels (bridged) off a 4 channel amp.
Thanks in advance..

You will only have one working channel if you are using 2 bridged channels total. Which means only one channel would be playing.. You can always use a Y splitter though

 

[IAD-Zak 10+ year member]

you wont have as much output even with a y splitter since youre using a 4 channel

 

[seatown1two 10+ year member]

you wont have as much output even with a y splitter since youre using a 4 channel

Signal is first going thru a line driver before the amp, does that make a difference? What would you recommend I do? There is a setting on the amp to use the inputs for channels 1 and 2 but the reason I want to use the sub signal is so I don't lose the functionality of the sub volume control on the head unit.

 

[IAD-Zak 10+ year member]

Signal is first going thru a line driver before the amp, does that make a difference? What would you recommend I do? There is a setting on the amp to use the inputs for channels 1 and 2 but the reason I want to use the sub signal is so I don't lose the functionality of the sub volume control on the head unit.

get a new HU

 

[seatown1two 10+ year member]

Not going to get rid of my factory head unit. Anyone else care to chime in?

 

[JoeK 10+ year member]

Dont you have two rear speakers?

 

[maylar 10+ year member]

Split the output of the line driver into both input channels. You need both inputs.