Comments on: JBL SUB 135 Woofer Speaker Repair

By: Jayar

Jayar — Mon, 01 Dec 2025 13:25:50 +0000

In reply to Lee.

No sounds

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By: Blade

Blade — Tue, 21 Oct 2025 05:47:55 +0000

I was hoping for a basic disassembly instruction 🙂 I need to get it apart to probably resolder the connections at the lowlevel inputs, it's extremely touchy... figured taking all the screws off the back would be enough, but maybe there's something I'm missing.

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By: Andres Henao Rosero

Andres Henao Rosero — Mon, 09 Dec 2024 22:48:06 +0000

Hi Robert, very good article, I have a sub 145 JBL, few days a go this leave the sound, a carry this to the technical service, this change the IC Limiter, this repair was ok, but days after, this begin to leave the sound and sound again for a days, and the last week, leave the sound, sound very low, what can will be?

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By: Robbie

Robbie — Tue, 01 Nov 2022 01:30:18 +0000

Hello Robert,

I have the same sub and it has crackling sound when the subwoofer is powered on with no input. Noticed that a couple of large resistors R146 & R149 are burned and I can’t tell the value because the code lines are invisible. By any chance do you know the values for these resistors? Thanks! Robbie

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By: Juan Febres

Juan Febres — Sun, 27 Mar 2022 00:42:16 +0000

I'm so glad to find this page, thank you for such informative repair. I have a JBL sub that stop working, I believe for the same reason. The board is identical to this one, although its a different model (SUB200). Mine still turns on for now, but I believe is about to finally pop because the PCB is darken around those 2 watt 330ohm resistors (R146, R149), the relay doesn't actuate, and last attempt to run measurements on it (live) I saw smoke coming out from a tiny resistor. I guess I will have to do the same you did... Thanks again!

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By: Tonytitan

Tonytitan — Tue, 23 Jun 2020 13:53:56 +0000

I just obtained on of these with this problem: as soon as it's plugged in the greed led lights and stays on regardless of the position of the on/auto switch or the on/off switch. The relay never clicks in like it does on my other sub136 units. I'm guessing here, but I think it's in protect mode with blown power transistors. If swapping them out is not the fix, where should I look next?

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By: Byron Filer

Byron Filer — Tue, 19 Mar 2019 17:22:36 +0000

In reply to Robert Calk.

I have 2 of these that are in need of repair. What would you charge?

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By: Mike Adcox

Mike Adcox — Mon, 09 Apr 2018 21:55:51 +0000

Robert, I just bought this exact sub today for $20 and it is missing the fuse and fuse cap as well as several of the speaker clips were broke just like this one... Where can you pick up a fuse cap? If that doesn't help it power on where would be a good starting point as to what to look for to fix this? I am definitely not an seasoned electronics guy like yourself but I am a fast learner and can usually figure things out (although it may take me a while) 🙂 If you can email me with some pointers that would be fantastic... I'm glad that I found this! Thank You Robert! Fantastic work!

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By: Robert Calk

Robert Calk — Wed, 27 Sep 2017 17:57:10 +0000

In reply to Debra Calk.

You are welcome, sis.

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By: Debra Calk

Debra Calk — Tue, 19 Sep 2017 20:56:00 +0000

Thank you Robert for fixing my woofer for my birthday, your sis Debbie

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