Amps and fans

[Johnny nocash]

My valve monos give off an 'egg frying' amount of heat which isn't great at this time of year. In addition I think it would be better for the amps if they were helped with a bit of ventilation. I read on a forum that the air should be drawn away, rather than blown over the amps. Also the flow should be constant rather than say from an oscillating fan. Any opinions?

 Obviously I'd like the fan to be as silent as possible so maybe looking at USB powered types. Anyone out there use them & can recommend a product?

Cheers

[Spectral Morn]

My valve monos give off an 'egg frying' amount of heat which isn't great at this time of year. In addition I think it would be better for the amps if they were helped with a bit of ventilation. I read on a forum that the air should be drawn away, rather than blown over the amps. Also the flow should be constant rather than say from an oscillating fan. Any opinions?

 Obviously I'd like the fan to be as silent as possible so maybe looking at USB powered types. Anyone out there use them & can recommend a product?

Cheers

I have owned a few amps with internal fans, I no longer own them. I can't stand fan noise. Its a shame the T+A V10 had one, other wise I would probably still own it.

Good luck on your quest, I have never not heard a fan. So be interested if anyone can suggest a silent one.

[Johnny nocash]

Agreed Neil.
I was hoping to place an oscillating fan behind the tv (the monos sit either side of it) to block off as much noise as possible.
But maybe a 'fixed' pair slowly turning across each mono would be better.

[Smegger68]

I'd be looking at some big, slow PC fans. 200mm jobbies typically rotate at about 800rpm which you simply won't hear above music. I have 2 80mm 1000rpm fans in my HTPC and unless I have my ear to the case i can't hear a thing.

[Firebottle]

I read on a forum that the air should be drawn away, rather than blown over the amps.

Turbulent air will 'stick' to the radiating surfaces better than laminar air and absorb more heat. Hence it is better to blow air over as the air is turbulent coming out of the fan (due to the blades chopping up the air).

[NRG]

Yup, on the digital forensic servers I used to work on the fans always forced air past and over the GPUs mounted in the expansion slots for best cooling.

[Johnny nocash]

Cheers Neal & Alan, I'd prefer this option as the air would be blown away from the amps. I presume the forum opinion in my OP was to reduce the amount of dust that may build up when blowing over the amp.

Bearing in mind the above, your suggestion seems like a good one James.

[Ali Tait]

I’ve just got hold of some Bastanis OB’s, they come with a 3000w Behringer DSP amp to run the bass. These Behringer amps come with a very noisy fan, which I’ve just swapped for one of these-

https://www.amazon.com/gp/product/B00KF7MVI2/ref=ox_sc_sfl_title_2?ie=UTF8&psc=1&smid=A1Z5H6ZGWCMTNX

I now have to hold my hand up to the vents in the front of the amp to tell if it’s working or not.

[Jazid]

I'd be looking at some big, slow PC fans. 200mm jobbies typically rotate at about 800rpm which you simply won't hear above music. I have 2 80mm 1000rpm fans in my HTPC and unless I have my ear to the case i can't hear a thing.I agree with you. Also, a simple pot allows the speed to be reduced so a balance between cooling and noise can be made. I have 80mm and 160mm fans in my PC and the latter are effectively silent, the smaller one inaudible in a quiet room from about 2m. The whole thing runs about 1m from where I sit when listening so I wouldn't suffer fan noise easily.

Quiet PC website is useful for fan comparisons I found.

Sent from my BLA-L09 using Tapatalk

[moggi1964]

https://www.acinfinity.com/component-usb-fans/multifan-s4-quiet-usb-cooling-fan-140mm/

AC Infinity MULTIFAN S4

I have one sitting under my Tubelab SE and it is inaudible and moves a good lot of air.

[Johnny nocash]

https://www.acinfinity.com/component-usb-fans/multifan-s4-quiet-usb-cooling-fan-140mm/

AC Infinity MULTIFAN S4

I have one sitting under my Tubelab SE and it is inaudible and moves a good lot of air.

Thanks Morris. The 'inaudible' bit is very important as I'm gonna need 2. I'd been looking at the range but they are quite a bit I more expensive

[Batty]

Run a 12volt fan off a 6v battery, will run slower and quieter.
1 for each amp.

[Bksabath]

Made a fan controller a few weeks ago on Martin F5 turbos
we have to use 140 mm fans due to sink size
200mm would be much better
speed controller is quite simple all you need is a mosfet a thermistor and a trimmer
all info is on my thread The bug is back

[alphaGT]

Turbulent air will 'stick' to the radiating surfaces better than laminar air and absorb more heat. Hence it is better to blow air over as the air is turbulent coming out of the fan (due to the blades chopping up the air).

That reminded me of the “Turbulent Juice”, commercials on Rick and Morty!

https://youtu.be/jbZZnYtapd0

Russell