sub hook up

sal16 said:
SE4runner, do you have the wiring schematics or diagrams for the jbl synthesis system? im gonna be working on a 4runner with it, but keeping the head unit; changing door speakers and adding two subs. the catch is, the center speaker and rear pillar speakers need to still work.
Sal

Sal, I haven't seen any for the JBL Synthesis, but haven't thoroughly gone through the manual yet.
 
twbauer said:

Also, SE4runner.... I didn't think that there were dedicated sub wires from behind the HU. In the schematic from Toyota, all I see is a left and right speaker lead with some kind of tx+ and tx- leads. Is there really a sub output back there?

I went through all the wiring that the installer did. It seems that you may be correct. The Hi-Low coverter was installed at the rear, near the cargo area. I checked every speaker carefully, and only the sub doesn't work, so he somehow managed to tap into the wires for the sub.
 
One drawback that I'm noticing in using the rear speaker wires for the High-Low converter, is that the front speakers seem to dominate, unless I have the amp gains all the way up for the Sub, and the surround sound on.

I can't wait til I get the factory hu and speakers changed.
 
As far as just the sub not working this makes perfect sense. There is a 4 wire clip that runs from the amp into the JBL built in sub. I'm sure that he just uncliped this and spliced onto those wires that are supposed to drive the JBL sub. This is the same thing that I did, accept I just used in-line couplers. I kept the JBL working and used the speaker level inputs to run into my alpine amp. I'm confused about you having to turn the gain all the way up though. I have to have mine turned all the way down so it is not completely over powering. I just have an apline 320 (I think). It's 80 RMS. But I do agree that the front speakers overpower the whole system. I read a thread where Thai explained very well why this is so. (sound staging I guess). I'm wondering what would happen if I would put in some aftermarket components in the front doors, without adding another amp, and just using the built in amp from the rear of the vehicle. It might even things out more. I was told that aftermarket speakers would be quieter than the factory onces, due to them being 4Ohm. Any thoughts?
 
I'm powering 1 10" JL Audio sub, with a Hifonics amp, bridged at 400 watts. When I have the Surround sound off, the bass is considerably and noticeably less. There's less of a thump. Overall, it's a huge improvement over the stock's sub, so I'm satisfied. It's only temporary, until I can afford the $1300 custom subwoofer enclosure the car audio shop wants.

If you mute the center speaker, it's a lot less loud. I was thinking of swapping the factory speakers too, but I'm just going to wait and do things the right way -- by adding kickpanels or a waveguide, so the music will be more centered with proper staging. Here's a picture of where I'm going to have the custom enclosure built. It's going to be a fiberglass a-periodic enlosure from one of the most reputable car audio shops in the US. (http://www.usdaudio.com).
 

Attachments

  • sub-panel.jpg
    sub-panel.jpg
    31.6 KB · Views: 557
Hey, that's the picture I took of my 4runner's stock sub & amp for CarDomain. I guess people found it useful. Notice the amateur scratches as I removed the panel. I also have a sub & amp installed using the high-level from the stock sub. It's good enough for now until I save up for a more complete install.

Here are a few more pics:
4runner_web_06.jpg

4runner_web_07.jpg

4runner_web_05.jpg
 
Last edited:
hrmm if your going to install a NICE system that pounds, you might want to get a better deck to control everything and manage the power output and such, or else you risk blowing out yuour equipment and/or loosing a lot of performance. Just drop like 100 bucks on a simple deck or go all out with a nice one, your call. I'm runnin one 12" W7 with a 1000/1 amp, and there is no way the stock deck would suit this setup so I got an alpine c831 or something (forget the exact #'s lol). anyways yeah do waht u want but i suggest getting a new deck and power supply.
 
hubbabubba said:
Hey, that's the picture I took of my 4runner's stock sub & amp for CarDomain. I guess people found it useful. Notice the amateur scratches as I removed the panel. I also have a sub & amp installed using the high-level from the stock sub. It's good enough for now until I save up for a more complete install.

Here are a few more pics:

does that smaller cover panel come off without taking the whole interior panel off first? Is there an easy way...Of course without tearing it all up.

I've tried a couple of times and it seems like its on there good....
 
The panel is on there pretty good, which I found out the hard way. There is a thread here somewhere that shows in detail how to remove the entire panel - can't remember who, but it's a better way to go.
 
I took off the entire panel and noticed the clips were permanently fastened for the smaller panel that goes over the sub....I'm not sure how people have removed it in the first place....anyway, removing the whole panel only took about 15 min.
 

Members online

Forum statistics

Threads
278,305
Messages
3,554,042
Members
248,016
Latest member
Advally Service

Trending content

Back
Top