Is it possible to wire a sub to a factory headunit?

 

Yes

 

Someone should sticky this particular question, along with the options to go along with it.

 

It will still get asked even if it's stickied

 

Avery, look for an amp with speaker level inputs or buy a line converter, then you'll splice off from the speaker wires to your amp. Remember the quad speakers are still playing the low bass unless you put a high pass filter in front of them so don't crank it too much.

crutchfield.com knows all

 

My Girlfriend has an inline converter on her 08 Escape and sound isnt quite as good as a aftermarket head unit but it still works quite nicely

 

I just upgraded my door speakers and added an amp and sub. Between the bass/treble adj. on the deck, and the Gain and lp filter on the amp, I dialed in the sound very nicely even keeping the stock deck.

side note: the rear speaker wires run under the carpet right next to the drivers seat on my 02 xlt 4dr. Thats a great place to patch into them for a speaker level input to a subwoofer amp.

 

its actually fairly easy.. I went to bestbuy, and bought a rca adapter.. it has two female ends running to one male end.. I cut the male end off, and seperated the two. then I took out my closest speaker, cut some of the coating off the wire, and wrapped the wires from the adapter around it.. then I run my rca cables from my amp to my adapter and wired my remote wire to my cluster fuse (: I can get pictures if anyone wants them..