Rockford sound system question

[ScaryFatKidGT]

So I have an 05 Off Road with the Rockford sound system and it sounds amazing... I have an aftermarket radio and am trying to wrap my head around how it all works...

380 watt's... 9 speaker 7 channel system... my guess is a 8 channel amp with 47.5w per channel, 47.5w to tweeters x2, 47.5w to front door speakers x2, 47.5w to rear components x2 and 47.5w to each subwoofer voice coil thus netting 380w and sense both voice coils get the same signal we have 7 "channels" is this correct?

With an aftermarket radio how does it handle the front speakers? Is there a crossover and DSP built into the amp AFTER the radio sends it's signal out or? The rears are just normal components both fed with 1 channel then split so thats easy. Also wondering how the sub works, whats it's corssover and how much DSP is at work?

 

[Prime]

OK. So the amp is under the passenger seat. To do an aftermarket radio the right way you need a harness that takes RCAs (the pre-outs on the new radio) and connects them to the factory wiring to go down to the amp.

I can't seem to get my Google-fu right this morning so I can't find the one I used.

The harnesses work by running down the speaker wire from the head unit, but it's an already amplified signal then and not really what you want.

You also need a PAC steering wheel control adapter so that your steering buttons work.

 

[meisanerd]

The one I used for my RF system was the Metra 70-7551

 

[ScaryFatKidGT]

OK. So the amp is under the passenger seat. To do an aftermarket radio the right way you need a harness that takes RCAs (the pre-outs on the new radio) and connects them to the factory wiring to go down to the amp.

I can't seem to get my Google-fu right this morning so I can't find the one I used.

The harnesses work by running down the speaker wire from the head unit, but it's an already amplified signal then and not really what you want.

You also need a PAC steering wheel control adapter so that your steering buttons work.

The one I used for my RF system was the Metra 70-7551

That's very interesting.... So with the right deck could you run a 3-way active system with the factory amp... or maybe lets say a 2.5 way since I think the sub receives the same signal as the door speakers... or count the factory sub as a door speaker and cross it over and have real subs and back to a 3 way.

I just have one like this minus the little electrical box and you are double amping and I don't fully understand how it handles the tweeter/door speaker signals... this is also the only one Crutchfield says fits so finding out about the 70-7551 is really interesting.

PAC ROEM-NIS2 Wiring Interface

Connect a new car stereo and retain the Bose amplifier in select 1994-2012 Nissan and Infiniti vehicles

www.crutchfield.com

 

[meisanerd]

If memory serves, there are only 4 signals going to the factory amp, FL, FR, RL, RR. The tweeters and subs are split off of those. I believe all of the crossovers and such are inline with the speakers somewhere, but I personally have never done anything beyond changing the head unit, which didn't mess with any of that.

I would probably use the Metra adapter over that one, the Metra takes the pre-outs which are already at the right signal level for the amp, that PAC messes with the signal inline as it takes the speaker-level outputs. You have to find the PAC for doing steering wheel control if you want to maintain that, not to wire up the speakers (unless they have a different one than what you linked that connects to the pre-outs on the new head unit).