Considering upgrading my alpine system

[IRSmart]

My 9 speaker system just isn’t enough for me. While I’ve done a ton of automotive wiring, this would be my first speaker upgrade. I’m considering putting 2 10’s or 8’s under the rear seats. A few questions:

Are there any sub boxes that will fit under the back seats that don’t interfere with the fold out floor?

If not, is there enough room behind the seats in a crew cab?

where are you guys installing the amps?

Can I grab the sound signal right from the old sub harness that I’ll be removing?

Any other tips for what I’ll need?

 

[quietpeen]

Are there any sub boxes that will fit under the back seats that don’t interfere with the fold out floor?

No, only oem

 

[quietpeen]

a lot of people mount their amps behind the seats

yes you can tap the signal from the harness to the oem subs with a LOC

 

[TomT]

a lot of people mount their amps behind the seats

yes you can tap the signal from the harness to the oem subs with a LOC

The back wall is definitely the best place to mount amps in our trucks. If you’re a bass head or into SQ, you might find the signal from the factory sub output lacking. They eq it so it won’t blow the little crappy factory sub. That means you won’t get a full signal feeding real subs.

The best (and of course more expensive) thing to use is the Pac Audio AmpPRO. It gives you multiple full range signals to feed whatever you like. Amps, DSP, etc.

 

[Gary2]

DAMN Tom , You should be able to weld with that set up ^^^^

 

[TomT]

DAMN Tom , You should be able to weld with that set up ^^^^

I can definitely weld my ears shut. LOLOL

 

[BWL]

My back wall isn't quite as loaded as tomt, but I have a fair bit back there. 2 10's can be fit and retain a useable load floor if you have the will and do a small seat lift. I lifted my load floor off the seat frame by 1/4" and thats all you can do without it catching on the seat when you try to fold it out. Then I did a 3/4" seat lift using longer bolts and 3/4" thick aluminim flat bar. Floor works decent for most things, but I put a couple short 2x4s under the legs to get them all on the ground for anything heavy like when I sleep back there. Also of note if you mount behind the seat be high enough and plan around the seat brackets as they are the tightest things to the back wall.https://www.ramforum.com/threads/rear-seat-lifting-for-subwoofer-box.119345/page-6
https://www.ramforum.com/threads/mounting-amps-behind-the-seat.140226/#post-1995118

 

[Midnight Storm]

Mine is more simple for sure. Not in the same league as some (@TomT) but WAY better than the stock 9 speaker still...
I did a plug and play net audio harness with a 10” JL and alpine 500w amp under the rear seat. You do lose the fold flat though.
Also very important to change the dash speakers and rear 6x9’s for infinity or JBL 3 way speakers and you get significantly better sound!
Don’t forget to soundproof things when you open them up.