I recently bought my forth Ford pick-up (beginning with a 68' F100 bought in 76'), a 2010 F150 Lariat Super Crew, no navigation, stock radio w/ CD/AM-FM/Sat. I usually do all my own music upgrades, but this system is so highly integrated, I don't know how much I can modify. I Started by replacing the stock speakers with Infinity component series (separate tweeters), it's a nice start, but I need more bottom end. I've found some sub-enclosure that will custom-fit under the rear seats, but how do I feed the Sub-Amp. Is there a line-out or sub-out on the stock head unit? Also, I want to dial-back the extreme low end going to the door speakers. I'm not looking for big volume, just a balanced, quality sound.

 

There are a couple ways you can go with this... there are Line Out Converters (LOC) that you can get that splice into the harness at the speakers that will give you line-level signals from speaker levels, to go straight to an amp (Which you can mount behind the back seat).

OR you can get a harness that sits between the head unit and the factory wiring harness to give you line level outputs. The difference is you have to run RCA cables from the HU all the way to the amp. This is good if you later change out the HU.

If you want to go "simple"... you can put bass-blockers in at the speakers themselves to keep the lows out and the LOC in the back to get line-levels... but there is a lot of splicing and wiring involved.

 

You will need a LOC (line out converter) this will tap into your stock speaker wires coming from the HU and convert the signal so you can use RCA to the amps. There are several type of loc on the market, the higher end ones will have the sound adjustment you seek.

 

Thanks Hobbes, Res4cue, that part (LOC) sounds straight foreword enough. I'm thinking I might not have got a good enough seal around the replacement (door) speakers, Infinity only provided a thin strip of sticky-back foam, and I think thats why the bass sounds weak. I've always had such good luck with Infinity, I was kind of surprised when the bass sounded so flabby. The door treatment from the factory looked petty good as well. Any suggestions on how to get a good seal on those new drivers?

 

Keep in mind that the stock HU has a built in safety net, this means that as you up the volume the the HU backs down the bass freq so as not to blow the stock speakers. My Infinity's amped off just the aftermarket HU sound incredible and there is enough tight good bass/midbass that my mirrors shake a bit.

You should be able to find an LOC that will allow you to tweak the signal so you get the most out of the system, I didn't want to go the stock route and I'm glad, not as "stealth" as stock but way nicer.

 

I too went non-stock with the HU... wanted to put a backup camera into it so I needed a screen...

Plus I didn't trust the stock HU not to mess with mah levels!

Did you ever get a sub RES4CUE?.... I know you are just down the street if you wanted to listen to my setup and see if it is strong enough for your tastes.

 

Not yet, been to lazy to want to do it. lol Cool thanks for the offer.

 

Steven...I installed a PAC AOEM FRD-24 as a LOC in my truck for inputs to my sub. It is plug-n-play. I still have the stock HU and all Sync and steering wheel controls work without any issues. It also has a remote wire built in to power on the sub.

 

I added a sub to my stock sync system. Tapped off the back passenger speaker. My amp , JL 250.1 has high level inputs and I have a JL 10" sub. I bought a box for the supercrew from Q logic.