Behringer Fan Mod - Entirely New Twist - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 75 Old 05-13-2020, 02:50 PM - Thread Starter
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Lightbulb Behringer Fan Mod - Entirely New Twist

Everyone complains about the fan noise of Behringer amps.

Since these amps need breathing room behind them, I figured I'd utilize it slightly differently. No cutting, no drilling, just direct bolt-on. I designed a 3D printed adapter that directs 2 92mm fans into the stock 80mm opening. Since there are 2 even larger fans you can run the RPM's way down and still flow more air. Additionally, since the 80mm opening is now clear (no fan motor in the middle), obviously, more air can pass.

The top is flush to the enclosure and the bottom hangs down a couple millimeters but it's still well above the bottom of the rubber feet.

Do what ever you want with the heat sinks.

I have attached the .STL file attached (in the .zip) so you can upload it to Shapeways or where ever if you want one too.

Enjoy your Behringers!

Edit 6/1/2020:

I get my 3D printed part and guess what? It didn't fit between the cables plugged in on the back. My rev 2 is on order and I'll update with photos when it arrives. Rev 2 is attached, is narrower and has been optimized for reduced material usage since Shapeways charges be weight. Their nylon is very strong and rigid and can be painted.

Edit 6/17/2020:

Rev fits and works but I have made further optimizations to make it fit easier and more securely. The changes also include reducing the thickness to lower the cost to 3D print since the service is charged by weight.

The 2x Noctua NF-A9-FLX fans I have mounted to it are nearly inaudible at 1 foot even without the LNA or ULNA adapters so I have left them out.

The fan header on the Behringer board are at standard .1 spacing but are much thinner that a standard .1 header forcing anyone changing the fan (weather using the dual fan adapter or not) to cut the plug off of the OEM fan and reuse it.

I also cut up the plastic packaging that the Noctua fans came in and supplemented the OEM Behringer ducting that is attached to the OEM fan via double sided tape to compensate for the removed OEM fan housing.



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Last edited by [email protected]; 06-17-2020 at 01:26 PM.
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post #2 of 75 Old 05-13-2020, 02:53 PM
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cool! And very innovative thinking! how to power them? wall wart?
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post #3 of 75 Old 05-13-2020, 02:55 PM - Thread Starter
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Originally Posted by ipca204 View Post
cool! And very innovative thinking! how to power them? wall wart?
Power them however you like but I put a small slot to get the wires inside so you can use the stock plug.

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post #4 of 75 Old 05-13-2020, 03:04 PM
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Quote:
Originally Posted by [email protected] View Post
Everyone complains about the fan noise of Behringer amps.

Since these amps need breathing room behind them, I figured I'd utilize it slightly differently. I designed a 3D printed adapter that directs 2 92mm fans into the stock 80mm opening. Since there are 2 even larger fans you can run the RPM's way down and still flow more air. Additionally, since the 80mm opening is now clear (no fan motor in the middle), obviously, more air can pass.

The top is flush to the enclosure and the bottom hangs down a couple millimeters but it's still well above the bottom of the rubber feet.

Do what ever you want with the heat sinks.

I have attached the .STL file attached (in the .zip) so you can upload it to Shapeways or where ever if you want one too.

Enjoy your Behringers!

Nice job!! I just replaced the top panel with Lexan and a 6" silent fan on top blowing down....


Juju

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post #5 of 75 Old 05-13-2020, 03:22 PM - Thread Starter
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Originally Posted by jujuman200 View Post
Nice job!! I just replaced the top panel with Lexan and a 6" silent fan on top blowing down....Juju
That good too...saw n see!

I didn't want to limit stackability but I do like to see inside.
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post #6 of 75 Old 05-13-2020, 05:05 PM
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That good too...saw n see!

I didn't want to limit stackability but I do like to see inside.
I totally get that.... that's why that berry is on the top of the rack....


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post #7 of 75 Old 05-13-2020, 05:46 PM - Thread Starter
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Originally Posted by jujuman200 View Post
I totally get that.... that's why that berry is on the top of the rack....
Juju
I don't get to have a rack...any guesses why? I'm can't be that fancy. My stuff all goes in the entertainment center so it's like, what goes on top?
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post #8 of 75 Old 05-13-2020, 05:54 PM
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I don't get to have a rack...any guesses why? I'm can't be that fancy. My stuff all goes in the entertainment center so it's like, what goes on top?
I know EXACTLY why... I just don't have that SO issue.... Plus my rig won't fit in a furniture unit [6 amps at the moment... not using them all]...


My wife said that she was tired of going to he movies and could I do something in the house.... I said sure... ** live sound guy by profession**. I can make it better than the theater... she said cool. My reply was.... don't complain about HOW I do it... See Sig...


She loves it.... WINNING!!



Juju
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post #9 of 75 Old 05-13-2020, 06:01 PM
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Quote:
Originally Posted by jujuman200 View Post
Nice job!! I just replaced the top panel with Lexan and a 6" silent fan on top blowing down....


Juju
Ghetto. There's shrouds in place to direct airflow as needed.
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post #10 of 75 Old 05-13-2020, 06:05 PM
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Quote:
Originally Posted by [email protected] View Post
Everyone complains about the fan noise of Behringer amps.

Since these amps need breathing room behind them, I figured I'd utilize it slightly differently. No cutting, no drilling, just direct bolt-on. I designed a 3D printed adapter that directs 2 92mm fans into the stock 80mm opening. Since there are 2 even larger fans you can run the RPM's way down and still flow more air. Additionally, since the 80mm opening is now clear (no fan motor in the middle), obviously, more air can pass.

The top is flush to the enclosure and the bottom hangs down a couple millimeters but it's still well above the bottom of the rubber feet.

Do what ever you want with the heat sinks.

I have attached the .STL file attached (in the .zip) so you can upload it to Shapeways or where ever if you want one too.

Enjoy your Behringers!
Interesting, you should do a smoke test and ensure the airflow direction is similar to factory.
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post #11 of 75 Old 05-13-2020, 06:10 PM
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Ghetto. There's shrouds in place to direct airflow as needed.
To each their own.... the fan I chose has double the airflow and the fan is directly over where the shroud terminus was... so I'm a few years in with ZERO ISSUES.....


Juju

Sub List: 1- Red Five Mini V1 Devastator 18" w/PA460, 1- Red Five Devastator LFE 21", 1- Red Five Devastator 21" Finalizer V2 DF , 1- BOSS platform [The Hideaway Theater], 2- 18" "Full Marty" tuned to 17Hz w/RSS460HO
Wish List: Anthology http://www.speakerdesignworks.com/Anthology_1.html


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Interesting, you should do a smoke test and ensure the airflow direction is similar to factory.
I did and it is... I sealed up the hole in the back and all the air exits the front of the unit...


Juju

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I did and it is... I sealed up the hole in the back and all the air exits the front of the unit...


Juju
I meant with a piece of plexi on top for example, make sure it flows over the components properly as stock did. Also, that reply was not to you. sticking a 6in fan on top and sealing the back will not provide adequate flow to everything between the fan and the back of the case.
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post #14 of 75 Old 05-13-2020, 06:21 PM
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[snip]... Also, that reply was not to you. sticking a 6in fan on top and sealing the back will not provide adequate flow to everything between the fan and the back of the case.
You left this comment under my post so who else was it for? "Ghetto. There's shrouds in place to direct airflow as needed."


Juju

Sub List: 1- Red Five Mini V1 Devastator 18" w/PA460, 1- Red Five Devastator LFE 21", 1- Red Five Devastator 21" Finalizer V2 DF , 1- BOSS platform [The Hideaway Theater], 2- 18" "Full Marty" tuned to 17Hz w/RSS460HO
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You left this comment under my post so who else was it for? "Ghetto. There's shrouds in place to direct airflow as needed."


Juju
Yes, that reply was to you, the one about smoke testing was not. Your design is clearly bad. The OP has something that may work well.

The 3ks and below have single fans and shrouds to direct airflow over some heatsinks. The 6k has two fans and no shrouds, but they flow air over the entire board, most of it directed over the heat sensitive bits.
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post #16 of 75 Old 05-13-2020, 06:28 PM
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Yes, that reply was to you, the one about smoke testing was not. Your design is clearly bad. The OP has something that may work well.

The 3ks and below have single fans and shrouds to direct airflow over some heatsinks. The 6k has two fans and no shrouds, but they flow air over the entire board, most of it directed over the heat sensitive bits.
Maybe so.... I have the fan directly over the heatsinks... does the shroud not direct the airflow over the heatsinks? Thought so.... you must think that I just centered the fan and called it good....SMH.


Juju

Sub List: 1- Red Five Mini V1 Devastator 18" w/PA460, 1- Red Five Devastator LFE 21", 1- Red Five Devastator 21" Finalizer V2 DF , 1- BOSS platform [The Hideaway Theater], 2- 18" "Full Marty" tuned to 17Hz w/RSS460HO
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post #17 of 75 Old 05-13-2020, 06:29 PM - Thread Starter
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Interesting, you should do a smoke test and ensure the airflow direction is similar to factory.
Good idea. I'll do that when mine arrives. I'll probably make a temp cover out of cardboard and plex so I don't have to cut the cover. I'll post up when I do.
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post #18 of 75 Old 05-13-2020, 06:30 PM
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Good idea. I'll do that when mine arrives. I'll probably make a temp cover out of cardboard and plex so I don't have to cut the cover. I'll post up when I do.
Even some cling wrap stretched tight would work fine.
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post #19 of 75 Old 05-13-2020, 08:54 PM
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OP - Can you give us a little more info? Which fans did you use? Have you personally installed this adapter yet? How are you wiring the new fans in? Are you removing the OEM fan in the amp? Any installed pictures?



Thanks.
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post #20 of 75 Old 05-13-2020, 09:40 PM - Thread Starter
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Mine is in print right now at Shapeways in grey PA12 (rigid nylon). I have a NU300DSP out in my garage that I carefully measured and modeled the adapter in SolidWorks. When it arrives, I'll post pics of it installed and the wiring. I ordered 2 Noctua NF-A9-FLX fans which are supposed to come with a Y cable, extension cable and two different resistors to slow it down by varying amounts. Though they are not shown in the one image, they are listed in the verbiage. The existing header is two pin and the fans are 3 so a dab of glue may be required to ensure the cable will never disconnect. Since the fans will turning so slow it will be safe to run them both from the original fan header in the NU3000DSP. May have to fill a small gap un one side of the existing air duct but I suspect it really won't make a whole lot of difference. More pics to come soon.
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post #21 of 75 Old 05-14-2020, 09:04 AM
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So as I understand it the issue of using an 80mm to 120mm fan adapter on the back of the amp is that the 120mm fan extends down below the amp's feet. There are actually several different offset and angled (45°, 90°, etc.) 80mm to 120mm adapters available that would solve that issue and a single 120mm fan feeding through the original 80mm fan opening seems to be the most elegant solution. The offset one in the first two images below is the one I'd probably go with:




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post #22 of 75 Old 05-14-2020, 09:53 AM - Thread Starter
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So as I understand it the issue of using an 80mm to 120mm fan adapter on the back of the amp is that the 120mm fan extends down below the amp's feet. There are actually several different offset and angled (45°, 90°, etc.) 80mm to 120mm adapters available that would solve that issue and a single 120mm fan feeding through the original 80mm fan opening seems to be the most elegant solution. The offset one in the first two images below is the one I'd probably go with:




That is a nice solution too if you have space above and/or below. Where can those be acquired?
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That is a nice solution too if you have space above and/or below. Where can those be acquired?
I just did a Google search for 80mm to 120mm fan adapter and went to Images. I think all the images I linked to were from eBay. For example, the offset one sells on eBay for $17.24 plus $5 economy shipping from a seller called elegantmarketing.
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post #24 of 75 Old 05-14-2020, 01:30 PM
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The new nx lines fans are not even loud.... Is this even needed?

Blasting brown notes for 20 years and counting!
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post #25 of 75 Old 05-14-2020, 01:43 PM - Thread Starter
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The new nx lines fans are not even loud.... Is this even needed?
I designed it for my NU, so in that case, yes.
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post #26 of 75 Old 05-14-2020, 06:08 PM
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The new nx lines fans are not even loud.... Is this even needed?
My NX6000D is pretty loud. You can definitely hear it from 15 feet away. Even at its quietest (I measured about 5V) at start up it’s still audible from 15 feet away.
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My NX6000D is pretty loud. You can definitely hear it from 15 feet away. Even at its quietest (I measured about 5V) at start up it’s still audible from 15 feet away.

I've got a 3000d and it's not loud at all. I mean, I can hear my projector fan from 15 feet but it's not loud. Of all the pro amps with fans I've ever heard, the nx line is by far the quietest.
If that's still too loud, then I guess have at it.

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post #28 of 75 Old 05-14-2020, 07:06 PM - Thread Starter
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Looks like this would still fit.
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post #29 of 75 Old 05-15-2020, 07:47 AM
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My NX6000D is pretty loud. You can definitely hear it from 15 feet away. Even at its quietest (I measured about 5V) at start up it’️s still audible from 15 feet away.

I've got a 3000d and it's not loud at all. I mean, I can hear my projector fan from 15 feet but it's not loud. Of all the pro amps with fans I've ever heard, the nx line is by far the quietest.
If that's still too loud, then I guess have at it.
Well this is my first pro amp that I’ve used in a home setting so I guess I have no other reference to compare. The spec sheet on the fan used in the NX6000d says it is rated at 40dB which is hardly quiet at all (though it produces a ton of static pressure and airflow). If that’s quiet enough for you then great but that is definitely distracting for me (I don’t use a projector either). I’m big on dynamics in sound (quiet should be quiet and loud should be loud) but I understand some people may just like loud.
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post #30 of 75 Old 05-15-2020, 09:28 AM
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Well this is my first pro amp that I’ve used in a home setting so I guess I have no other reference to compare. The spec sheet on the fan used in the NX6000d says it is rated at 40dB which is hardly quiet at all (though it produces a ton of static pressure and airflow). If that’s quiet enough for you then great but that is definitely distracting for me (I don’t use a projector either). I’m big on dynamics in sound (quiet should be quiet and loud should be loud) but I understand some people may just like loud.
The inuke series as a whole seems to have gone through a couple fans, to add to the confusion. Some later model inukes report not having noise, others do. That being said, my 6000dsp is pretty loud, but I haven't bothered swapping the fan yet. I probably will, however. My projector fan is pretty quiet in comparison, even when it's right above my head and the inuke is about 10' from me.
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