Quieter Fan Mod for Behringer EP2500 - Page 11 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #101 of 206 Old 01-12-09, 02:28 PM
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Re: Quieter Fan Mod for Behringer EP2500

And I should have mentioned that I only run one channel and I never go above -2.0/1.0dB in my AVR(up to +10dB)

If I get a second driver or a different single one that can take the ~2K watts then I will make sure I remember this.
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post #102 of 206 Old 01-12-09, 05:25 PM
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Re: Quieter Fan Mod for Behringer EP2500

its good to know - i have a qsc amp and did the same thing - i changed out my fan and it seems to work great and no issues at all so far - i did clip once but i was playing the music loud - not the normal loudness - but really loud - plus i had the gains up a little past half - i have since left the gains half way -
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post #103 of 206 Old 03-04-09, 09:53 PM
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Re: Quieter Fan Mod for Behringer EP2500

Without reading every page of this thread I run my ep2500's pretty hard. Has anyone ever had any problems with them getting too hot etc with this mod? With 3 of them running in my 1 room its pretty loud just don't want to have to worry about them getting to hot or over heating as I am pushing them hard when I am using them.
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post #104 of 206 Old 03-04-09, 10:59 PM
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Re: Quieter Fan Mod for Behringer EP2500

No worries at all... you should be fine.
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post #105 of 206 Old 03-05-09, 02:33 AM
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Re: Quieter Fan Mod for Behringer EP2500

I'm gonna go with this fan for my behringer:
http://dk.farnell.com/papst/8414ngr/...questid=589225

As suggested by thread starter, seems like a low db solution.
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post #106 of 206 Old 03-05-09, 10:12 AM
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Re: Quieter Fan Mod for Behringer EP2500

Quote:
stupify wrote: View Post
Without reading every page of this thread I run my ep2500's pretty hard. Has anyone ever had any problems with them getting too hot etc with this mod? With 3 of them running in my 1 room its pretty loud just don't want to have to worry about them getting to hot or over heating as I am pushing them hard when I am using them.
I ran into problems. But I am a minority. I personally suggest to leave it stock, but many have gotten away with it no problems.
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post #107 of 206 Old 03-25-09, 05:06 AM
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Re: Quieter Fan Mod for Behringer EP2500

I have fitted a 120 ohm 1w resistor inline on the positive line of the original fan, first I fitted a potentiometer and upped resistance until the sound of the fan was reduced enough and made sure there was plenty of air movement still then checked the resistance of the pot and replaced with the resistor. So far it seems to work well I can't hear the fan at -35db from 1.5m away and there actually seems to be more airflow at the front of the filter?? possibly just less turbulant flow and more laminar

I am also planning to fit a mono 3.5mm jack and a relay so it can be switched from a normal receiver switch automatically.

Ash
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post #108 of 206 Old 04-03-09, 10:52 PM
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Re: Quieter Fan Mod for Behringer EP2500

I notice this amp kicks out a bit of heat even when idling. Well, it stands to reason the 300 watts or so it is taking to idle, is being converted into heat.

The Digikey fan was probably selected partially due to its low noise. Notice, when you look up the specs, it is the quietest but also the lowest flow of a series of several fans. If you replace the letter "L" with an "M" it takes you to a fan which would be louder, but quite a bit more output/flow...and the "H" is even a notch louder/higher flow.
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post #109 of 206 Old 04-06-09, 10:54 AM
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Re: Quieter Fan Mod for Behringer EP2500

Quote:
hxmonaro wrote: View Post
I have fitted a 120 ohm 1w resistor inline on the positive line of the original fan, first I fitted a potentiometer and upped resistance until the sound of the fan was reduced enough and made sure there was plenty of air movement still then checked the resistance of the pot and replaced with the resistor. So far it seems to work well I can't hear the fan at -35db from 1.5m away and there actually seems to be more airflow at the front of the filter?? possibly just less turbulant flow and more laminar
I think I like this approach better than a fan swap. This seems like it would get the best air flow while customizing the maximum amount of noise that can be tolerated. If someone could tolerate more noise, they could simply use a different value of resistor. I am not an electronics expert but I don't see how this simple electrical change could damage the unit. If anyone has any other input, please speak up. Of course, it could still get too hot I guess but I think that is very unlikely unless you are pushing something *EXTREMELY* hard.

Mike
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post #110 of 206 Old 04-20-09, 12:29 PM
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Re: Quieter Fan Mod for Behringer EP2500

just switched out my fan with one from Digi. The sound is much more tolerable. I simply cut the wires and used wire nuts to connect them together. Took all of about 10 mins, most of it screwing and unscrewing. It is now quieter than my projector (epson 7500) and about as loud as my toshiba HDDVD. I'll let you know if it overheats or has problems.
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