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Thread: MMATS Amplifier - Replacing The Noisy Fan.

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    Noob JimmyDee's Avatar
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    MMATS Amplifier - Replacing The Noisy Fan.

    I think I saw another post somewhere, about how a member had replaced the fan on his MMATS amp.
    As I recall, he used a Noctua fan (which might be better than the ones I used).
    At any rate, I figured I'd give a step-by-step on how to replace the fan in a MMATS amp.
    I did both my MMATS amps, and the whole process took about 20 minutes (10 mins per amp).

    First of all, here is the link to buying the fan:

    Noctua Fan:
    https://www.amazon.com/Noctua-Coolin...s%2C200&sr=8-3

    Here's what I ended-up using:
    https://www.amazon.com/2-packs-0-10A...xpY2s9dHJ1ZQ==

    First, you need to remove the top plate from the amp, by unscrewing the 4 allen bolts at each corner:
    Click image for larger version. 

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    Here's a 'guts shot' of the MMATS HiFi-6150. It's a stout little beast.
    They maximized real estate by mounting the PC boards upright (kinda like what Mosconi does).
    Click image for larger version. 

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    MMATS uses Fujicon capacitors. Not the best, but far from the worst. Comparable to Nichicon.
    Click image for larger version. 

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    Here's the offender... his days are over.
    Click image for larger version. 

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    Remove the 2-pin connector for the fan. Remember which way the plug is positioned. (if you forget, then I've detailed it below)
    Click image for larger version. 

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    Carefully cut the top edge of the fan. It is glued to the amp chassis with silicone.
    Click image for larger version. 

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    After cutting it, I got in there with a very small flat screwdriver and pried it away from the chassis.
    Then just pull it away, and clean the silicone from the amp chassis.
    Click image for larger version. 

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    Then apply some glue (or silicone) to the four corners of the new fan.
    I used Gorilla glue. Notice I got a drop on the fan blade... fffaaaa! I cleaned that off before installing it.
    Click image for larger version. 

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    Then just press it back into place. I also added a drop of Krazy Glue, to quickly hold it there, while the Gorilla Glue dried.


    Note: when putting the new fan in; the connector should have the white plastic facing the SCR chip (right beside the pins on the PC board).
    Click image for larger version. 

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    The other side of the connector has two exposed metal pieces. This faces away from the SCR.
    Click image for larger version. 

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    Attached Images Attached Images  
    BMW OEM Head Unit (into) mObridge DA-G2.PRO
    Amplification: MMATS HiFi-6150D, MMATS HiFi-4250D
    Front Stage: Sinfoni Tempo 10, Dynaudio Esotar 430, Audio Development W800-NEO
    Rear fill: Audiofrog GB10, GB40, GB410C passive crossover
    Subwoofer: AudioFrog GB10D2

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    Noob JCsAudio's Avatar
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    Re: MMATS Amplifier - Replacing The Noisy Fan.

    Is there an issue with the fan that comes with the amplifier or is it a noisy fan that might be heard if mounted in the regular cab pickup? If so I would think MMats should include a better fan for the price point they are at assuming a bunch of things about cost of production. Nice write up

    I would love to get one of those amplifiers on my test bench and compare it to less costly class D and A/B amplifiers I have with some high end speakers.
    Sienna SB29 Focal PS165V Alpine SWS10 Mazda CX5 AF GB15 AF GB60 AF GB12 Ford F150 AF GB10 JLC5 Sundown SD310.

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    Enjoys a good Queef blockrocker's Avatar
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    Re: MMATS Amplifier - Replacing The Noisy Fan.

    Its been labelled a noisy fan, but I have mine installed in a truck cab and have not noticed the fan noise too much. Certainly not enough to take away from my listening experience. Just a noob opinion though. ;-)

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    Noob JimmyDee's Avatar
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    Re: MMATS Amplifier - Replacing The Noisy Fan.

    The fan is dead silent, when it's new... but after about 6 months, it gets kinda loud.
    This is my only gripe with MMATS amplifiers.

    Ya, I'd say they are using cheap fans. Could easily be overted by using a decent fan in the first place.
    BMW OEM Head Unit (into) mObridge DA-G2.PRO
    Amplification: MMATS HiFi-6150D, MMATS HiFi-4250D
    Front Stage: Sinfoni Tempo 10, Dynaudio Esotar 430, Audio Development W800-NEO
    Rear fill: Audiofrog GB10, GB40, GB410C passive crossover
    Subwoofer: AudioFrog GB10D2

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    Enjoys a good Queef blockrocker's Avatar
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    Re: MMATS Amplifier - Replacing The Noisy Fan.

    Quote Originally Posted by JimmyDee View Post
    The fan is dead silent, when it's new... but after about 6 months, it gets kinda loud.
    This is my only gripe with MMATS amplifiers.

    Ya, I'd say they are using cheap fans. Could easily be overted by using a decent fan in the first place.
    Thats good to know, I'll keep an eye/ear on mine.

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    DIYMA Janitor SkizeR's Avatar
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    Re: MMATS Amplifier - Replacing The Noisy Fan.

    Noctua is definitely the way to go if you want to replace a fan

    Sent from my SM-G975U using Tapatalk

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