Oh yipee - I have to build a cooling rig for my new amp

MusicDirector

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Actually, it's no big thing, component and even cabinet cooling rigs are easy to build and not expensive either although cabinet rigs may be harder to install.

My new amp generates tremendous heat (at least to me), the other day it clocked in at 116 degrees on average, but has reached higher. That's more than enough to make me very nervous.
The cooling rig I did for the old amp does not work on the new one due to the venting layout and as it happens the old cooling rig was getting quite noisy. With my new amp only giving me 4 inches of top clearance in my cabinet, that also changes the game. (I can adjust the shelf above or the shelf the amp is on to give me another inch, but that's about it and one inch is not going improve things).
My old rig had the warm or hot air exhausting out the top, but my profile was also several inches lower. With my new amp I don't have enough clearance at 4 inches to exhaust out the top (at least not without setting the shelf above on fire or something).

My cabinet is open front and back (thank goodness), but it's huge and I hate climbing behind it and also don't want to put holes in it, etc. (I should have designed it with built-in cooling, but since it's an open front/back design I didn't think I'd need it). So, what to do? We cool the component, just like I did the first amp. This time though due to different dimensions I am building a different cooling rig.

What I am doing basically, is taking two 12v Blower fans such as what is sometimes found on high-end GPU cards (I think 120mm). Basically, one flat side has a bigger opening for the blades than the shroud on the other side and then the air is vented through vents on one narrow/vertical end. The blower fans sit directly on the amp with little rubber feet that raise them a very tiny bit off the surface and prevent movement and are wired with a manual 12v DC speed control and a 500mA 110-12v AC-DC small wall wart allowing me to plug it in on a separate power strip.
The two blower fans are rated at 17CFM airflow and a noise level of 19.8dB(A) at max speed. (I have no idea how quiet they will be at 19.8dB and since I listen to soft volume only, hence the speed controller).
Seeing that the amp has two intake fans at the bottom I figure by having the two blower fans exhausting the hot air out the back that should increase airflow enough to drop the unit 10 degrees or better.

If need be, I can add a 120mm low speed AC fan on a little metal stand and set it on the same shelf to increase intake air, but I don't think I'll need to. Not sure I'd want to as that would add about 33dBA of noise at full speed.

Anyone can build this stuff, really especially if I can do it. If you understand airflow (which is easy peasy) then you can make a cooling rig. Parts are easy to obtain and no need to do hard-wiring, they(read just about everywhere) have molex-AC adaptors and all that stuff readily available.
 
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I just wish I could find a fan that is quiet; ie. 0db of fan noise. Currently, I have this sitting on the shelf between my two amps. The only time I can hear it is when the music gets quiet, but with string quartets that happens often. When it runs the temp on the shelf above the amps will go from 82 to 79.

Amazon.com - Vornado Zippi Personal Fan, Black - Electric Household Tabletop Fans

I'm surprised it's that loud.

I do have something here though that I know is almost dead slient and may be the same amount of air moved: I know this because I have one and always leave it on by mistake on my desk because even with my exceptional hearing due to over-compensation for my poor vision, I don't hear this thing even on the high setting.
Honeywell Mini Chillout Tower Fans : Target
 
I have good hearing, which comes in handy for this hobby, but can also be a curse. Plus, I am really anal about unwanted background noise. I moved my refrigerator into the garage to eliminate its background noise.

Well, try one of those little chillout fans I linked, I think you'll be surprised how quiet they are. (Provided it fits where you need it to of course).
 
Eric, if you want some new 120mm fans let me know. I have a bunch that I got for free after rebate. I'll probably never use them all.
Thanks very much Matt, but I'm using some special shrouded ones for my build this time. However, if I find I need a couple more plain 120mm fans, I'll take you up on that.
 
EndPCNoise.com has lots of ultra quiet fans which I have used over the years in my workstations. (If you need a new source.)
 
I need one of those in the summer; my amps might run a degree or so cooler, and me it has a psychological impact on my cooling brain system:

aegean_black_maple_large.jpg


* But I should admit that anything over 30° Celsius and nothing is going to change much that hot air into cool air, unless a very noisy air conditioner. ...And some days we're hitting 40° Celsius! ...Then better go at the beach under the biggest palm tree, with a cooler and a six-pack inside.

Class A tube amps in the summer of the middle? ;)
 
Thanks very much Matt, but I'm using some special shrouded ones for my build this time. However, if I find I need a couple more plain 120mm fans, I'll take you up on that.

So what amp do you have that you need this special cooling?
 
So what amp do you have that you need this special cooling?

Well, by special shrouded fans I mean simply that they are preformed or made in the shroud that is like one finds on higher-end video cards. Basically, just directs the air.
The amp is nothing unique or special, but I also do not wish to state what it is as it does not meet the requirements for mention.
 
Heat is a killer, let me tell you.

Just had a client server install, and his Pre/Pro generated so much residual heat that the eSilentPC cubby hole became an oven. Tough to dissipate heat that way on a passive solution. What I had thought was a hardware issue (on my end, which never, ever happens) was quickly resolved by him installing a few silent fans in the back of the pre/pro. Thankfully, no damage to the server, either!

Guys (and gals) - be careful. We invest so much in this hobby that taking out something just because we didn't ventilate properly is beyond depressing/tear-inducing.
 
Well, by special shrouded fans I mean simply that they are preformed or made in the shroud that is like one finds on higher-end video cards. Basically, just directs the air.
The amp is nothing unique or special, but I also do not wish to state what it is as it does not meet the requirements for mention.

Oh, one of those amps. I gotcha.
 
Yes Emile, we cannot put the emphasis strongly enough about heat versus audio electronics; particularly in the heart of summer.

...All audio/video electronics: Amplifiers, preamplifiers, SSPs, receivers, CD/SACD players, Blu-ray players, HDTVs, Ultra HD TVs, front projectors, phono stages, turntables, headamps, etc., etc., etc.

And tubes, them too need to be cool off. ...Yeah, particularly tubes, and Class A amps.

And the biggest audio killer after heat is NOISE! ...Like noisy fans for example, or your fridge, or the distortion inside your audio components (analog and digital): THD+N, S/N ratio, jitter, IMD, rumble, wow and flutter, mechanism friction, harmonic distortion (several levels), etc., etc., etc.
 
Yes Emile, we cannot put the emphasis strong enough about heat versus audio electronics; in particular in the heart of the summer.

...All audio/video electronics: Amplifiers, preamplifiers, SSPs, receivers, CD/SACD players, Blu-ray players, HDTVs, Ultra HD TVs, front projectors, phono stages, turntables, headamps, etc., etc., etc.

And tubes, them too need to be cool off. ...Yeah, particularly tubes, and Class A amps.

And the biggest audio killer after heat is NOISE! ...Like noisy fans for example, or your fridge, or the distortion inside your audio components (analog and digital): THD+N, S/N ratio, jitter, IMD, rumble, wow and flutter, mechanism friction, harmonic distortion (several levels), etc., etc., etc.

Absolutely! I also do not tolerate heat anymore like I used to (one too many heat strokes will do that. happened to me 3 times and changed my body tolerances....so now my electronics and I can relate).
I don't have heat concerns with CDPs or DVD players etc., but my amp being the obvious and my TV can also do some cooking in summer as the PC s can as well. PCs fail faster than anything else in heat it seems. That's why my laptop is custom built to evade that issue and my tower (aka desktop) has a fan in the rear, one on the side, two in the front, and what to me looks like a propeller from a small airplane on top. It also has an internal power supply fan and fan on the video card and the biggest proc cooler with fan you'll ever see. It also has air filters that unfortunately need to be cleaned often which means taking the thing apart. Over the top? Perhaps, but I also have experience in seeing how a PC can fail with a little heat and the solution involved a fire extinguisher at the time, so a little overkill doesn't hurt in my book.
 
Absolutely! I also do not tolerate heat anymore like I used to (one too many heat strokes will do that. happened to me 3 times and changed my body tolerances....so now my electronics and I can relate).

You personally had 3 heat strokes?!
 
You personally had 3 heat strokes?!

Yup, one moderate and 2 mild. You would have thought the first one would have woken me up, but I also didn't think it would happen again at the time. More than enough to change things. Surprising how little it takes to get to that point. Had to go get a room A/C unit after the third time. This was several years ago. I was living in an apartment (better than the one I am in now), but had no A/C and fans did next to nothing one summer. Inside was reaching 90 degrees and things got dicey. I was getting sick to my stomach, dizzy, slightly demented, shaky and having trouble breathing on the verge of passing out.
I now can not tolerate anything over 78 degrees indoors. Outdoors is not much different to me now.
 
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