How I added Alpine amp to JBL Synthesis system in my 2011 Venza - Toyota Nation Forum : Toyota Car and Truck Forums
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post #1 of 53 Old 01-20-2013, 11:11 AM Thread Starter
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How I added Alpine amp to JBL Synthesis system in my 2011 Venza

So I am complete with Phase 1 (creating a custom box for my Rockford 10" speaker, detailed here) and now with Phase 2 (Alpine amp install tied into the 13 speaker JBL Synthesis system)

Interfacing with the "stock" JBL amp (model # 86820-0T010) posed a few challenges:

- The signal between the stock Nav head unit and the amp is a digital signal, taking away the ability to just slap on a line level converter and call it a day

- The front speaker outputs are actively crossed over *inside* the amplifier, taking away the ability to hook the converter to the speaker outputs

So to get a clean and full range signal to the Alpine amp, it took purchasing an Audio Control LC6i to do so. This device takes the signal going to the dash 3" mid/1" tweet and the door mounted 6x9 and combines the signal into one. Another nice option was the ability to add a dash mounted knob to control the bass level separately than the rest of the system. (other options to the LC6i, but way more expensive: the JL Audio "Clean Sweep" and the Rockford Fosgate 3Sixty.3).


Installation of the Audio Control stuff:

- I started with removing the driver seat's four 14mm bolts and then put the seat all the way back and leaned it up against the rear seats, this gave me room to work *and* didn't require me to unplug the seat which could cause an SRS light if you turn the car on with that unplugged





The JBL amp has four plugs on it, using the picture above:

- the far left plug has two red wires (constant power leads for the amp) and two other wires (not sure what they do, but it doesn't matter)

- the far right plug with thin gauge wires are the (digital) input signal leads from the radio *with* the 12v remote turn on lead on the far right edge of the plug (closest to the back of the car)

- the middle two plugs are the speaker outputs. I didn't have any leads of what was what so I took off the power window clusters off each door (they just lift straight up) and removed the grill from the 3" dash speaker, removed the two 10mm bolts holding those in and then used my multimeter to find the wires from these locations to the amplifier... very time consuming, but worth it as I found everything I need.












- Then I popped off the dash piece that contains the phone holder and mounted my bass level control inside the storage bin and fished the wire through the console down to the LC6i





- Here is the LC6i install completed






Amplifier Installation:

- First things first, where/how to run the power wire to the battery. I started inside the car looking for a grommet to poke through to get from inside the car to the engine bay. I found a nice spot just above the gas pedal and poked a straightened out metal hanger, taped my power wire, and put a little bit of grease over the tape so it slides through easily. Here is the result of that:







- Remote turn on for the Alpine amp was piggybacked on the JBL's turn on lead (again, far right plug, green wire on the end)




- I dug into the rear storage compartment of the center console, remove the two 10mm bolts holding it down and was able to lift it up enough to run and tuck under:

--> Power wire
--> Remote turn on wire
--> 4 channel RCAs from the LC6i

- I peeled the carpet back, scraped off the paint from a solid metal part on the floor and ground the amplifier there


- Completed amp install:






- All this powering my completed subwoofer enclosure:







Phase 3 during the summer will be to replace the front and rear speakers with a good quality 3 way set and powering them off the Alpine amp (which is 5 channel and can handle the whole car)


Thanks for reading !!





References:
- Modified Life
- Audio Control LC6i
- Alpine PDX-5
- Rockford Fosgate P3 Shallow Mount Punch Subwoofer

Last edited by MorningZ; 01-29-2013 at 11:35 AM.
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post #2 of 53 Old 01-20-2013, 02:44 PM
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good pics and info! You really know your stuff.

2013 Sunset Bronze Venza Limited V6 AWD
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post #3 of 53 Old 01-20-2013, 03:42 PM
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Love it!!

I just installed an Alpine 5 channel (less power than your PDX) under my passenger seat as well yesterday. I was inspired by your subwoofer install and wanted to update my system. I'll take some pics when the weather's a bit warmer to post up but here's what I installed to replace my stock 6 speaker system:

Head Unit: Pioneer AVH-P4100DVD
Amp: Alpine MRX-V60 (5 Channel)
Front Speakers: Alpine SPS-619 (6"x9")
Rear Speakers: Alpine SPS-610 (6.5")
Subwoofer: Pioneer TS-SWX251 (10")

I still have to tune it with the proper settings on the amp but so far it's been a great improvement over the stock system.


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post #4 of 53 Old 01-20-2013, 03:46 PM
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Neat way mounting the sub inside the wheel! How does it sound?
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post #5 of 53 Old 01-20-2013, 05:53 PM
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This is an excellent write up, thank you.

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post #6 of 53 Old 01-21-2013, 07:56 AM Thread Starter
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Originally Posted by gold94corolla View Post
Neat way mounting the sub inside the wheel! How does it sound?
after spending the weekend with everything all hooked up, my biggest (but minor) problem sound-wise is the front door 6x9's... since they aren't crossed over to remove the low bass from them, they distort as they try to keep up with the added on woofer... this will be solved when I move the rest of the speakers off the JBL amp and onto the Alpine amp

Still have a *little* bit of time to spend on the fiberglass enclosure and sealing up small air leaks... i already knocked out like 4 of them by sealing them up with silicone.... there may be a few more to seal up
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post #7 of 53 Old 01-21-2013, 10:26 AM
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Is this custom leather? Or maybe just some slick seat covers?

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post #8 of 53 Old 01-21-2013, 11:07 AM
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Quote:
Originally Posted by bigcsorren View Post
Is this custom leather? Or maybe just some slick seat covers?
Those are the Clazzio seat covers. He has this post about them.

My Customized Venza

35% Tints/K&N Intake/Tint Head-Tails/Billet Grille/MagnaFlow CatBack/22" Asantis/265-40R22/Megan Coilovers
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post #9 of 53 Old 01-29-2013, 11:45 AM Thread Starter
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Follow up:

My notes I was making got buried in the garage and I found them as I was putting stuff away the other night, so here are the pin locations for the front speakers at the JBL amplifier:

To note, the tweeters on the dash are wired together with the 3" dash speakers and passively crossed over, so there are no dedicated speaker leads at the amp for just the tweeters

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post #10 of 53 Old 03-07-2013, 08:35 AM
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Sorry to dig up this thread, but I was planning a very similar install and I wanted know a little more on how you hooked up the LC6i (it's a little tough to tell from the pics).

As far as I can tell, you connected the 3" speaker leads to the Main Channel on the LC6i and the 6X9 speaker leads to Channel 3 on the LC6i, correct? Did you then use the summing feature of the LC6i to sum the main channel and channel 3 to the main output?

Thanks in advance for your help.
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post #11 of 53 Old 03-07-2013, 08:54 AM Thread Starter
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Using page # 6 as a reference:

http://www.sound-better.net/Support/...nd/LC6i_OM.pdf

Driver and Passenger 3" dash speaker leads are tapped for the LC6i's "Main Input"

The driver and passenger door mounted 6x9 leads are tapped for the LC6i's "Channel 2"

Crack open the LC6i and move the jumper to "Summed" and now the 3 sets of RCAs coming out of the LC6i are "full range" signals

.
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post #12 of 53 Old 03-07-2013, 09:00 AM
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Quote:
Originally Posted by MorningZ View Post
Using page # 6 as a reference:

http://www.sound-better.net/Support/...nd/LC6i_OM.pdf

Driver and Passenger 3" dash speaker leads are tapped for the LC6i's "Main Input"

The driver and passenger door mounted 6x9 leads are tapped for the LC6i's "Channel 2"

Crack open the LC6i and move the jumper to "Summed" and now the 3 sets of RCAs coming out of the LC6i are "full range" signals

.
Genius! Thanks!
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post #13 of 53 Old 04-02-2013, 03:55 PM
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Here is a link to the 2008 Tundra JBL wiring diagram. While not the same unit as what's in the Venza, based on the wire tracing MorningZ has done and my own research*, the diagram for the speaker wiring seems to be the similar across the two systems (specifically, the rear speakers).

Disclaimer: I am not responsible for any damage you do to your vehicle by using this document. It is for reference only

https://docs.google.com/file/d/0B6P7...it?usp=sharing


*While I haven't had time to test, I am in the process of tracking down the rear speaker leads to integrate with the LC6i. The driver's side 6.5" is yellow (+ ?) and black(- ?) while the passenger side is red (+ ?) and white(- ?).
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post #14 of 53 Old 04-02-2013, 04:26 PM Thread Starter
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use a AA battery wired across those Yellow/Black and Red/White wires to figure out polarity... one wire to one side of the AA and the other wire to the other side of the AA

if you have (+) and (-) correct: the speaker will pop outwards when you apply that DC voltage
if you have it backwards: the speaker will suck in when you apply that voltage

Last edited by MorningZ; 04-02-2013 at 04:32 PM.
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post #15 of 53 Old 04-02-2013, 05:23 PM
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Quote:
Originally Posted by MorningZ View Post
use a AA battery wired across those Yellow/Black and Red/White wires to figure out polarity... one wire to one side of the AA and the other wire to the other side of the AA

if you have (+) and (-) correct: the speaker will pop outwards when you apply that DC voltage
if you have it backwards: the speaker will suck in when you apply that voltage
That's exactly what I planned to do. Modified Life shows a different polarity than the wiring diagram for one of the speakers, so I need to test before I tap. That is, if Toyota wired the speaker correctly to begin with as there have been anecdotes to the contrary.
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