Toyota Tundra Forums banner

Adding subs and amp to stock JBL system on 07' Tundra DC

5935 Views 2 Replies 3 Participants Last post by  MaylonTRD
Hi everyone,

I recently got an '07 Limited Tundra Double Cab with the JBL audio system in it. Compared to the stock stereo in my Tacoma, this sounds great. However, I found it was lacking in the bass department and the 55 watt JBL sub was not cutting it for me. I already have 2 10" KICKER CVRs and a ZX1000.1 amp from my install on the Tacoma, and I'm looking to add these to the JBL system.

My plan: I'm building two small boxes that will rest on the floor in the back with the seats flipped up and will be removable if I need to use the seats. The subs are large and will not fit under the rear seats, but I am willing to sacrifice the room. I'm not too worried about routing the power and stuff, but my major concern is the audio signal to my ZX amp. What I'm going to try and do is rob the signal from the existing sub. If I unplug that, I find that there is a mono speaker-level signal for that sub. I'm going to find a way to attach that to some RCA's and set the amp to the high-level input mode, which it has.

My concerns: 1: That the speaker-level signal is processed in some way by the JBL amp and will be poor quality for my amp and subs.
2: Since the speaker-lever signal is a mono signal, I would only be able to hook it up to one of the inputs (R or L) but since this is a mono amp anyways, I'm thinking that this won't matter.

Does anyone know if this will work? Thoughts? Suggestions? I spent a lot on these subs and amp the first time around, and I'm looking for the cheapest way to get them going in this Tundra.


Also, I forgot to mention, the whole reason that I'm doing this is because I would prefer to keep the stock HU. I like the Handsfree features seeing as talking on your cell phone is illegal up here now. The settings in an aftermarket HU for Subwoofer volume not being there is solved by the remote base knob that is supplied with the ZX amp.
See less See more
1 - 3 of 3 Posts

I don't know if you already figured it out but you can access your stock amp under the passenger seat. You will need a special wire harness you can get from most car audio shops that has high output wires---to RCA plugs. All you need to do is splice into the stock amp harness and determine the +/- channels. Once you have the right wires spliced, the RCA's can plug right into the amp. Unfortunately the built in crossover for most amps is fairly weak and your using a high output frequency so another crossover or equalizer will give you optimum sound quality/control. Your stock deck will be able to control the bass still and it will sound great if hooked up right however if your looking for plastic shaking maximum output---get that extra device. I have pushed 2 JL W7's like this and the sound quality with the stock setup is top notch. Good luck and let me know if you need pics or something.
Hey man welcome to the forum. I am definitly not the guy to help with these types of problems. However, I just wantet to let you know that if you can't find your answer in this forum there is a forum for audio stuff and there are some really smart guys that hang out over there. Good luck with your system and here's a link for you.
Audio & Stereo - Toyota Tundra Forums : Tundra Solutions Forum
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.