JBL Amp Impedence

Chili · Jan 12, 2025

2021 Tacoma with JBL system. Does anyone know if the factory JBL Amp is 1 ohm stable for a subwoofer? I know it has a 2 ohm DVC sub, but wondering if it possible to run it at 1 ohm without damaging the amp?

destin_meeks · Jan 12, 2025

I believe the factory sub is 2ohm per voice coil. The amp will most likely overheat fairly quickly if run at 1ohm on any channel

SloTaco13 · Jan 16, 2025

See post #31 in the thread "Upgrade 3rd gen Jbl speakers":
https://www.tacomaworld.com/threads/upgrade-3rd-gen-jbl-speakers.517420/page-2#post-18190748

Below, I've copy+pasted WarpedAlien's post from that thread, where he provided all the factory JBL amp and speaker specs:

WarpedAlien said: ↑

Here is what the Toyota JBL system consists of (info from another website):
Dash-Board 2.5" Speakers:
Speaker Specs:
--Resistance: 2 ohms
--Average Power from amp over a 1100hz range: 11.87 Watts
--Max Power from amp achieved at any hertz: 12.5 Watts at 600hz and 533hz
--Amp is outputting roughly 12 watts RMS at 2 ohms to these speakers.
Crossover Characteristics
--These speakers play down to about 250hz before cutting out and go up to 15khz+
--The crossover with the 6x9's start at 550hz. (6x9's start playing at 500hz, while the 2.5" pick up around 250hz. Both play between 250-550hz)

Front Door 6x9's Speakers - Basically a midwoofer and part of a component setup with the dash speakers which are not tweeters.
Speaker Specs:
--Resistance: 2 ohms
--Average Power from amp over a 500hz range: 26.75 Watts
--Max Power from amp achieved at any hertz: 30.81 Watts at 158.7hz
--Amp is outputting roughly 25 watts RMS at 2 ohm to these speakers
Crossover Characteristics
--Like above, 6x9's play from 20hz-550'ish hz while the 2.5 play 250hz - 15khz+.
--Both play between 250hz-550hz

Rear Door 6.5" Speakers
Speaker Specs
--Resistance: 4 ohms
--Average Power from amp over a 500hz range: 21.27 Watts
--Max Power from amp achieved at any hertz: 24.32 Watts at 267hz
--Amp is outputting roughly 21 watts RMS at 4 ohms to these speakers
Crossover Characteristics
--None, these are full range speakers, they get 20hz-20khz.

8" DVC Sub 2ohm
Speaker Specs
--According to Toyota documents this sub is powered by 2 channels. Each one operates at 2 ohms
--Amp supplies a total of 110 watts (according to JBL's website) to both channels so 55 watts RMS at 2 ohms per channel

The AMP
Not sure if a 6 or 8 channel amp. Will have to look further into it.

The OP that wrote this physically measured each speaker but not the amps output.

See this thread for more info on directly swapping the speakers. I haven't found a great solution to the issue. I would love nothing more than to pull all the speakers out and ad an amp and sub box. But I don't think it's worth it and I am looking for an alternate to replace the speakers only including the sub. By the way the sub would be easy to replace. There are a few 2 ohm DVC shallow mount Subs available.
https://www.tacomaworld.com/threads/premium-audio-upgrade-for-less-than-250.510424/

So far I have found a few 2.7 and 3 ohm speakers that may be good replacements for the front. The rear doors are easy to find in any brand. The sub is easy to find also.
That being said, what to replace the dash and door with. Not to mention sound deaden the door. 6x9 can produce as much bass as and 8 inch sub if mounted correctly.
I have noticed a lot of people using the direct drop in subaru tweeters. Not one as mentioned the ohm rating or RMS on these.
If you use the subaru tweets why are some dropping a full range 3 way 6x9 in the doors?

$98 Subaru Genuine Tweeter Kit Kicker WRX STi Forester Crosstrek Impreza H631SFJ101

https://www.amazon.com/gp/product/B00PV6F8I2?ie=UTF8&smid=A2S91GH47JS3RY
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destin_meeks I used to fix people's crappy stereos

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