5 channel Amp output connection to door speakers

Hey guys, was wanting to get some advice. I'm doing a big stereo upgrade on my 21 Dcsb taco.

Here's what's in store and coming soon.
Sony xav 9500es from Trail grid pro.

Jl audio stealth box with 10tw3-4 it's wired in parallel for a final impedance of 2 ohms.

Jl vxi 1000/5. 5 channel Amp with built in DSP.

The truck already had Kicker speakers in the doors when I bought it used.

I have all the wiring and harnesses needed to do this. I'm going to use RCA's to run to the amp. I've got the 9 conductor wire for the speakers and remote wire. And of course I have the power wire, ground and fuse holder.

So these are my questions...

When I run wires for the speakers on the amp output, can I wire it to the side of the harness that runs out from the stereo to the speakers? Can I cap the end that I don't need? Would that be sufficient for output from the amp to the kicker door speakers? Or could I just use T taps on the harness to send power to the door speakers? Or is there a better way of doing it besides wiring to the door speakers directly from the amp?

Thanks for any and all help. I haven't been in the car audio scene in many years lol. I've never hooked up something that cost this much... I certainly don't want to screw it up in any way.

 

Speed wire (multi-conductor cable) from the amp to behind the radio.

Cut the speaker wire part of the harness on the Sony (I'm assuming trail grid pro pre-builds the harness for you?)

splice speed-wire to the part of the harness you just cut that connects to the factory harness.

I would pop the door panels and remove the speakers just to ensure they were installed correctly. It's too easy to skip that part

 

Yes trail grid pro wires everything to harnesses so it's just plug and play.

Thanks for the help.

 

what do you have installed in the upper dash? something to consider is that if you're still running the stock stereo, and the stock tweeters there, you will need to upgrade them--they simply can't handle much more power than the factory radio.

it's fine to connect the amp to the speaker wires behind the radio. but just note that the 'front' speaker wires travel first to the dash tweeters, and then via a 2-pair-shunted plug(4 wires) on the tweeter, to get to the door speakers. if they're currently installed and you don't want them, you'll need to disconnect them, and order some adapters to plug in again-- otherwise the front door speakers won't work.