L'acoustics LA8 Amp module repairs
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Category: General
Forum Name: General Forum
Forum Description: Open Discussion / Questions
URL: https://forum.speakerplans.com/forum_posts.asp?TID=108528
Printed Date: 26 March 2026 at 8:43pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: L'acoustics LA8 Amp module repairs
Posted By: brokenjoe
Subject: L'acoustics LA8 Amp module repairs
Date Posted: 20 May 2024 at 4:37pm
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Anyone know anyone that can fix these, i have about 6x ch4 modules doing the Dc fault thing or anyone know how to sort? i have cleaned them, and tried in different LA8s seems crazy to bin them all ------------- error 404 |
Replies:
Posted By: VECTORDJ
Date Posted: 20 May 2024 at 5:15pm
| D-class......JUNK. |
Posted By: KDW32
Date Posted: 20 May 2024 at 9:50pm
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Where are you based? If UK I can pass on help to fix class D. |
Posted By: KDW32
Date Posted: 20 May 2024 at 9:54pm
You think powersoft, linear and ffa etc... are no good ? |
VECTORDJ wrote:Posted By: brokenjoe
Date Posted: 20 May 2024 at 11:38pm
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just the modules not the whole amp ------------- error 404 |
Posted By: brokenjoe
Date Posted: 20 May 2024 at 11:39pm
i'm in birmingham ------------- error 404 |
Posted By: brokenjoe
Date Posted: 20 May 2024 at 11:39pm
thank you for great input ------------- error 404 |
Posted By: KDW32
Date Posted: 21 May 2024 at 12:38am
There's a guy working out of slx in Bristol should be able to help you I'll DM/pm his details.
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Posted By: MarjanM
Date Posted: 21 May 2024 at 8:02pm
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Arent those Pascal modules inside? ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: kedwardsleisure
Date Posted: 30 May 2024 at 1:47pm
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camco ------------- Kevin North Staffordshire |
Posted By: MarjanM
Date Posted: 30 May 2024 at 4:54pm
Camco used Pascal modules in their amps. That is why i ask is it Pascal inside. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: brokenjoe
Date Posted: 31 May 2024 at 8:26am
absolutely no idea ------------- error 404 |
Posted By: kedwardsleisure
Date Posted: 31 May 2024 at 9:50am
I've only ever seen camco boards in the LA8, each of the 4 modules are custom for the position in the amp, they are not interchangeable even in the same amp ie you cant swap say ch1 with ch4. They're somewhat better quality than pascal.     ------------- Kevin North Staffordshire |
Posted By: brokenjoe
Date Posted: 10 June 2024 at 11:16am
the only difference is the length of the cables i have regulary put them in different postions when working out which were the ones were playing up on the shelf ------------- error 404 |
Posted By: voron
Date Posted: 04 February 2025 at 1:55pm
| I have a lot of skills of repair LA8 output amp modules and PSU, even in it have burned MCU's...but I'm located in Russia:) |
Posted By: rafavalle
Date Posted: 09 March 2025 at 6:56pm
| Is there a way to get this amp modules? does camco sell those? |
Posted By: VECTORDJ
Date Posted: 09 March 2025 at 9:59pm
| LOL.....D-CLASS IS JUNK.....ALMOST IMPOSSIBLE TO FIND SOMEONE WHO CAN FIX THIS STUFF...D-CLASS = FAKE POWER RATINGS.....D-CLASS = NON-REPAIRABLE....LOL. |
Posted By: brokenjoe
Date Posted: 10 March 2025 at 10:04am
thank you for your input. really useful. ------------- error 404 |
Posted By: BrainlessTekno
Date Posted: 10 March 2025 at 10:49am
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I get what you mean; it's like the old car vs. new car debate. Fixing a 2010+ car at home is nearly impossible, while older ones often just need a screwdriver. It’s a fair point, but that doesn’t mean we should avoid newer and better technology. For instance i do like D-class more than A-class junk=heavy af broke my back ------------- BarSick / barsik soundsystem Dont want to toot my own horn but toot toot |
Posted By: Jan-2T
Date Posted: 10 March 2025 at 11:01am
Hey Voron, do you have schematics? I've repaired few class D amps, may want to help. ------------- Music! |
Posted By: voron
Date Posted: 10 March 2025 at 2:39pm
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No, I have self-drawn schematics of some pars of amp, but for my repairs only |
Posted By: njw
Date Posted: 10 March 2025 at 8:06pm
Yep, that's why every professional touring and hire company are using class D these days and have been for a very long time, 'cause it's junk... I like a big old school toroidal amp as much as the next sound guy but who wants to be lugging those about these days? And repairing them when 20+ year old components inevitably start going pop? It's a bit like a sales rep in 2025 driving a Vauxhall Cavalier. P.S; Why are you shouting?
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Posted By: kedwardsleisure
Date Posted: 11 March 2025 at 10:12am
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L'Acoustics do a replacement kit for these modules, comes with new screws, tie bases, ties, rivets and instructions etc. There is also a returns form where you should fill out the failure circumstances of the old module, so I suspect they want them back as part of the deal. But you must specify the channel number you need. The cables have to lie flat and true under each other and are all different lengths. You can't order a longer one and cut it down unless you're ok with IDC connectors and if it's too short it wont reach and the PCB transition header is soldered in making removal tricky. I would talk to your local L'Acoustics dealer. MAke sure you're sitting down before they tell you the price. ------------- Kevin North Staffordshire |
Posted By: brokenjoe
Date Posted: 11 March 2025 at 10:40am
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i have already bought replacements, they are about £400 each.. and will soon be obsolete hence having so many of them on the shelf.. always CH4 next to the fan The ribbon cable is easily swapped from module to module, so if you have spare ch1, you could just swap the cable from the broken one and it'll no issues ------------- error 404 |
Posted By: jacethebase
Date Posted: 11 March 2025 at 10:43am
Have you started buying to to LA12X yet Joe? ------------- www.wedding-production.co.uk www.stage2sound.com |
Posted By: brokenjoe
Date Posted: 11 March 2025 at 10:54am
i have 3 la4x, and waiting on some better prices for 12x .. i don't really have any need for 12x at the minute other than the la8s becoming old.. i only found out that the la4x and 12x are powersoft last week, after replacing an encoder ------------- error 404 |
Posted By: voron
Date Posted: 11 March 2025 at 5:32pm
| Beware of fake la4x, the chinese make amplifiers that can work with the original la-network software |
Posted By: Cue Peter
Date Posted: 10 February 2026 at 10:00am
Hello Voron, I don't suppose you would know why an LA8 has 4V on the 5V rail and no +15V/-15V ? Just received one for repair and customer said it worked for a while when power cycling a few times which sounds like a capacitor(s) problem but so far can't find any that look iffy.
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Posted By: VECTORDJ
Date Posted: 10 February 2026 at 12:48pm
| D CLASS = FRAUD |
Posted By: voron
Date Posted: 10 February 2026 at 12:53pm
| Are you missing +-15V on just one output module or all of them? If it's just one, check the zener diodes on these power rails and the small chokes nearby. If there's no +-15V on all channels, check the main power supply. |
Posted By: Cue Peter
Date Posted: 10 February 2026 at 1:10pm
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Thanks a bunch for reacting, much appreciated! It turns out the psu was working just fine when tested outside the unit. I have meanwhile traced the fault to the dsp board (the one connected to the front display). When popping another in from a different LA8 the machine starts up as it should. Now that I have that one out I can see there have been made repairs on it already. Weird that it would mess up the power supply that much, but at least I am making progress here. |
Posted By: FOO
Date Posted: 10 February 2026 at 1:11pm
Please stop these childish outburst.. We get it.. You can't afford Touring Grade gear, so you bash it to feel better about yourself
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Posted By: voron
Date Posted: 10 February 2026 at 1:14pm
| If the Actel FPGA on the DSP board is faulty, it will not be possible to perform repairs at the component level and the entire DSP board will need to be replaced. |
Posted By: Cue Peter
Date Posted: 10 February 2026 at 1:22pm
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Yeah I think I found the culprit. Can't post a picture of it but a capacitor next to Y2 (C63) seems burnt out.
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Posted By: josaudio
Date Posted: 13 March 2026 at 11:39am
| I have many PSU and CH3 or CH4 damaged, is it possible to fix them? |
Posted By: voron
Date Posted: 13 March 2026 at 11:48am
| Yes. I can repair both power supplies and output amplifier modules. The main problem is that I'm located in Russia, and there are difficulties with both shipping the equipment and paying for my work. |