Comments on: Must Read- Italian Made Powered Speaker Improvements

By: Wasim

Wasim — Tue, 07 Jul 2020 21:30:23 +0000

Nella foto allegata c'è una temperatura molto alta
MONTARBO w440a
Vi prego di contattarmi per aiuto
==================================
In the attached photo there is a very high temperature
MONTARBO w440a
Please contact me for help

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By: saber

saber — Fri, 08 May 2020 01:22:24 +0000

In reply to MB.

any one plz have clear photo of w440 board

the 440F board

i need it to fix my montarbo

thnx

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By: MB

MB — Thu, 03 Oct 2019 15:28:20 +0000

I wanted to really thank you.
I recovered a Montarbo W440A after its internal soundproofing took fire because of some heat problem on the tweeter amplifier. I made it work as a single-amplified system by purchasing the W440P crossover, and sending to the input of the bass amplifier the whole signal, taken from the circuit before it is divided into high and bass sections -obviuosly it would have had less power than before. It worked but it had a lot of background noise and the sound became orrible after ten minutes of operating -the distortion you described. I applied your guide. After it just needed a very very gentle low pass filter on the input because the highs and mids were really too much (about 6/7 dB too much at 10 000 Hz). Thank to you now the system is working like it always should have worked.

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By: Justice

Justice — Mon, 14 May 2018 13:42:33 +0000

Excellent article Riaan.

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By: Carlo Alberto

Carlo Alberto — Mon, 14 May 2018 08:57:29 +0000

A high-level fix: respect, man!

This board seems a 440-Series by Montarbo. Probably, the Factory knows some issue related with the heat ....

In the official "Care and Maintenance" notes, it put on evidence "Do not expose the enclosure to heat sources (lamps, lights, high power light sources, radiators or other products that produce heat)".
Maybe, somebody has noted an undersize of some heatsink ... 😉

Well done. Cheers!

Carlo

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By: Yogesh Panchal

Yogesh Panchal — Sun, 13 May 2018 16:00:01 +0000

Riaan,
Thanks for sharing excellent modification tip.

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By: caison

caison — Sat, 12 May 2018 17:57:58 +0000

thanx that is a professional work

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By: Albert

Albert — Sat, 12 May 2018 03:50:06 +0000

Very professional job that only can be done with the right knowledge of the matter! It is clear that you know your way in these special audio repairs.

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By: Humberto

Humberto — Fri, 11 May 2018 16:47:17 +0000

A very professional job, Mr. Riaan. Congratulations.

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By: OYO MARK

OYO MARK — Fri, 11 May 2018 15:17:41 +0000

Thank alot . But i request for circuit of the amp.

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