Factory Sub with aftermarket amp+Radio

[Alex Gerst]

Hey all,
I just Insatlled a new audio setup in my Brabus.
I put in the Pioneer avh3100 radio and a 4ch hifhonics amp, Focal 165v2 in the doors and I did the tweeter piller mod. And Ive got the underdash sub box and to top it off a 8" bazooka tube in the back!!

Now my question is I want to wire in the factory sub to my radio speaker outputs (Deck Power)
Does anybody know what speaker outputs from the factory harness go to the factory amp. I looked at eviloutins site and Im not clear on wich pins go to the factory sub for input.

Right now Ive got my amp powering the door speakers thru the factory radio harness and the rear factory leads that are not connected. but if I connect them the factory tweeters come on.
Thanks! Alex

[John_H]

There are two channel pairs in the factory harness: door R/L and tweeter R/L, no "rear" channel. The sub mixes and filters one door channel and the opposite tweeter channel. You can tell which (L/R) from the second wires coming out of the factory wiring harness into the smart; the smaller wire goes to the subwoofer harness.

Since there's no adjustment to the amount of subwoofer boost, you may want to snip these wires and rewire to the subwoofer output of the aftermarket radio where you can adjust the level. Whether wiring in parallel or just wiring one channel to the sub output is appropriate is not obvious, however.

[sato7]

If I may ask.. Why are you installing an 8" bazooka, an 8" under dash sub, AND an under the seat 5" sub??? that set up is conducive for a very muddy sound output. If you feel MORE is BETTER and MUST have three low end speakers in the tiny cab at least tune each box to a certain range of Hertz that bests its output. like mid base, base, sub...

[Alex Gerst]

"If I may ask.. Why are you installing an 8" bazooka, an 8" under dash sub, AND an under the seat 5" sub??? "
Well, The reson is I will probley take the bazoka tube out, for rear hatch space. And I do have the boxes tuned differntly the under dash is reproducing 150-50hz and the bazooka is tuned for 70hz and down. so far the bass responce is great, im running the system almost flat And its not muddy at all.
But I wanted to have the factory sub working since it is there allready. From what I can tell from the factory system, the factctory sub really likes to "hit" around 60hz its seems to come alive around that frequincy.

[Alex Gerst]

Originally Posted by John_H

There are two channel pairs in the factory harness: door R/L and tweeter R/L, no "rear" channel. The sub mixes and filters one door channel and the opposite tweeter channel. You can tell which (L/R) from the second wires coming out of the factory wiring harness into the smart; the smaller wire goes to the subwoofer harness.

Since there's no adjustment to the amount of subwoofer boost, you may want to snip these wires and rewire to the subwoofer output of the aftermarket radio where you can adjust the level. Whether wiring in parallel or just wiring one channel to the sub output is appropriate is not obvious, however.

Thanks for the info,
What im going to do is use the speaker level output to regulate how much gain is goin to the factory sub. im only using the rear channel of my radio so I use the fader to balance the factory sub level