Sub install in '06 Tacoma Double Cab and general truck questions >>>

[BenWA]

Putting an aftermarket sub in my Tacoma behind the rear seats. Not a lot of space back there, so options are limited to shallow-mount sub in a thin truck box, with the woofer cone facing forward.

Gonna put a Pioneer 10" shallow-mount in a custom sealed box that I am designing and building, with 200 RMS amp dedicated to it.

Questions are as follows:

1) Has anyone here ever spliced an aftermarket amp into the factory "premium" JBL system in a '05 or later Tacoma? There is currently a factory amp behind the rear seat that runs all the speakers and the factory sub. If I am just replacing the factory sub and adding an aftermarket amp to power the aftermarket sub (I'm leaving the factory head unit, speakers, and factory amp in place), do I want to spice into the speaker leads before they go through the factory amp? Or should I spice into the current subwoofer output leads that come out of the factory amp that go to the factory sub? I'm assuming the factory amp has some sort of built-in crossovers and such. I want the best, cleanest signal possible going to my aftermarket amp/sub and would rather not have to deal with line-level converters and such.

2) As an extension of the previous question, does anyone who has worked on this particular factory system know which specific wires (color codes) I should be tapping into? Or alternatively, can anyone suggest a way to find out which wires I should be looking for?

3) In terms of optimum acoustics from a sub in a 4-door pickup truck, does subwoofer location matter much? As stated, my options are limited to behind the rear seat with woofer facing forward. Would it be better if the sub was offset to one side of the cab or the other, compared to being centered behind the rear seats? Or would it be better centered? Or doesn't it matter?

Thanks for any tips!

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[BenWA]

Can anyone at least help with question #3 pleeease?? //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I want to get cracking on building an enclosure ASAP, and I'm not sure whether to build it such that the woofer sits behind the middle of the rear seat or to make it offset to one side or the other.

Either way, the woofer will have to be facing forward in a thin, low profile box -- not much room to play with. Somehow I'm guessing the acoustics would be better if the sub was off center....

Plz help! My box design depends entirely upon the proposed sub position.