11 Attachment(s)
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:
Attachment 7703
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).
Attachment 7704
MMATS uses Fujicon capacitors. Not the best, but far from the worst. Comparable to Nichicon.
Attachment 7705
Here's the offender... his days are over.
Attachment 7707
Remove the 2-pin connector for the fan. Remember which way the plug is positioned. (if you forget, then I've detailed it below)
Attachment 7708
Carefully cut the top edge of the fan. It is glued to the amp chassis with silicone.
Attachment 7711
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.
Attachment 7712
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.
Attachment 7713
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).
Attachment 7709
The other side of the connector has two exposed metal pieces. This faces away from the SCR.
Attachment 7710
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.
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. ;-)
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.
Re: MMATS Amplifier - Replacing The Noisy Fan.
Quote:
Originally Posted by
JimmyDee
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.
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
Re: MMATS Amplifier - Replacing The Noisy Fan.
I've contemplated doing the same. I only really notice the fan if I have no music playing though.
3 Attachment(s)
Re: MMATS Amplifier - Replacing The Noisy Fan.
I just followed this great tutorial and successfully swapped the stock fan for a Noctua one. Piece of cake, thanks Jim.
Attachment 10315
Attachment 10316Attachment 10317
Re: MMATS Amplifier - Replacing The Noisy Fan.
Quote:
Originally Posted by
blockrocker
I just followed this great tutorial and successfully swapped the stock fan for a Noctua one. Piece of cake, thanks Jim.
I'll be doing my fan swap shortly, too... Is the Noctua much quieter?
Re: MMATS Amplifier - Replacing The Noisy Fan.
Its supposed to be, but I only put the fan in tonight, and haven't got the amp back in.
The pros and cons of the fan so far:
Multiple speed options and connection options are nice and I'm sure make the fan very versatile. You can immediately see its a quality part. However, the cord is quite a bit longer than the stock fan, especially with the cord extensions (speed and plug combo). I ended up gently folding the cord up a few times and used some heat shrink to keep it together and get the cord to a workable length.
I'll post again in a few days when the system is up and running again.