Pre amp connections on an amp.

[negolien]

Could someone explain the pros and cons of this? I was thinking of just using the pass thru off of my sub amp to use for my amp that's going to power my rear deck 6x9's.

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[trumpet 5,000+ posts]

Your speaker amplifier needs a full range signal. Your subwoofer amplifier most likely is not going to give you that. It certainly won't if you use a low pass filter before the subwoofer amplifier. Are you using your factory head unit? What's your thought process on this?

 

[negolien]

Thanks I' am using a Pioneer AVH-X5500BHS. I have the subwoofer filter set to 55 I think it is on the H.U. Not sure what is set on the Amp I had it professionally installed about 5 years ago. I was just thinking if I didn't need to tap the RCA's on the back of the H.U. I would do the install myself but if I have to get behind the head unit and run the RCA's to the trunk I will just take it in and have it done. Getting a little lazy in my old age lol.

 

[negolien]

I read some more into this and I' am still confused it says....

"Line Level Output: The amplifier has a pair of gold-plated RCA line level outputs for feeding a full-range stereo signal to another amplifier. It is the same signal that is input through the line inputs. The amplifier's crossovers have no effect on the line level output signal."

 

[trumpet 5,000+ posts]

That means it will pass through whatever signal comes in to the RCA inputs.

 

[negolien]

So if it's getting a subwoofer signal from the head unit it won't be a full range but if it's a full range signal from the head unit it will be full range? Also if it's low passed at the head unit it affects the signal also right?

 

[trumpet 5,000+ posts]

So if it's getting a subwoofer signal from the head unit it won't be a full range but if it's a full range signal from the head unit it will be full range? Also if it's low passed at the head unit it affects the signal also right?

Yes