Bahringer EP4000 Question.

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unsafe8989 · #1 Post by **unsafe8989** » Tue Jan 31, 2012 12:55 pm

When i recieve these amps is it fine to remove the filter. Also if i turn the fan around will it affect it from back to front to front to back.

Dan30 · #2 Post by **Dan30** » Tue Jan 31, 2012 1:00 pm

Are you going to be using it for HT or for gigs?

unsafe8989 · #3 Post by **unsafe8989** » Tue Jan 31, 2012 1:05 pm

DJ Gigs one on subs other depending on gig size mostly subs.

Dan30 · #4 Post by **Dan30** » Tue Jan 31, 2012 1:07 pm

I wouldn't even bother then. You won't even hear the fan when the music is playing.

unsafe8989 · #5 Post by **unsafe8989** » Tue Jan 31, 2012 1:21 pm

Thats not an issue i meant to change the airflow and remove the filter thats their for no reasons.

Frederic Gelinas · #6 Post by **Frederic Gelinas** » Tue Jan 31, 2012 1:34 pm

unsafe8989 wrote:Thats not an issue i meant to change the airflow and remove the filter thats their for no reasons.

I never understood those filters. They are there to prevent the dust from getting out of the amp or what?! Shouldn't be smarter to put the filter at the inlet to keep the dust outside the amp? It looks like the prototype had the fan backwards and once they noticed, it was too late: they decided to give it a fancy name and market it like that. Complete non-sense to me.

I removed the filters on all my Behringer amps.

unsafe8989 · #7 Post by **unsafe8989** » Tue Jan 31, 2012 1:39 pm

Frederic Gelinas wrote:
unsafe8989 wrote:Thats not an issue i meant to change the airflow and remove the filter thats their for no reasons.
I never understood those filters. They are there to prevent the dust from getting out of the amp or what?! Shouldn't be smarter to put the filter at the inlet to keep the dust outside the amp? It looks like the prototype had the fan backwards and once they noticed, it was too late: they decided to give it a fancy name and market it like that. Complete non-sense to me.

I removed the filters on all my Behringer amps.

Is it difficult to remove them, in a forum i seen it came off in pieces and is it bad if i reverse the fan so air flows from the front to back.

Dan30 · #8 Post by **Dan30** » Tue Jan 31, 2012 2:33 pm

I had one of those filters in one of the grills on my PC. After I removed it I noticed the dust started to build up more. I personally wouldn't touch it.

unsafe8989 · #9 Post by **unsafe8989** » Tue Jan 31, 2012 2:42 pm

Dan30 wrote:I had one of those filters in one of the grills on my PC. After I removed it I noticed the dust started to build up more. I personally wouldn't touch it.

But this filter makes no sense on blockibg the dust from not coming out?

Bruce Weldy · #10 Post by **Bruce Weldy** » Tue Jan 31, 2012 3:24 pm

unsafe8989 wrote:
Dan30 wrote:I had one of those filters in one of the grills on my PC. After I removed it I noticed the dust started to build up more. I personally wouldn't touch it.
But this filter makes no sense on blockibg the dust from not coming out?

It may be there to keep dust from coming in when the amp isn't on. Dust doesn't know it's an outlet.....it's just an opening like any other.

Gregory East · #11 Post by **Gregory East** » Tue Jan 31, 2012 4:49 pm

Behringer copied the design from QSC I believe. I'm guessing when they ordered up fans their supplier gave them ones that went the wrong way because nobody told them otherwise.

I'd be very careful about turning around a fan to suck instead of blow. There could easily be issues with it not sealing up properly.

unsafe8989 · #12 Post by **unsafe8989** » Tue Jan 31, 2012 4:52 pm

Gregory East wrote:Behringer copied the design from QSC I believe. I'm guessing when they ordered up fans their supplier gave them ones that went the wrong way because nobody told them otherwise.

I'd be very careful about turning around a fan to suck instead of blow. There could easily be issues with it not sealing up properly.

Thanks. i guess i will leave them stock, hope for no overheating.

el_ingeniero · #13 Post by **el_ingeniero** » Tue Jan 31, 2012 9:29 pm

Gregory East wrote:Behringer copied the design from QSC I believe. I'm guessing when they ordered up fans their supplier gave them ones that went the wrong way because nobody told them otherwise.

I'd be very careful about turning around a fan to suck instead of blow. There could easily be issues with it not sealing up properly.

And QSC got the design from an expired Crown patent ...

unsafe8989 · #14 Post by **unsafe8989** » Tue Jan 31, 2012 9:32 pm

el_ingeniero wrote:
Gregory East wrote:Behringer copied the design from QSC I believe. I'm guessing when they ordered up fans their supplier gave them ones that went the wrong way because nobody told them otherwise.

I'd be very careful about turning around a fan to suck instead of blow. There could easily be issues with it not sealing up properly.
And QSC got the design from an expired Crown patent ...

Got a link or model?

el_ingeniero · #15 Post by **el_ingeniero** » Fri Feb 03, 2012 9:32 am

Sorry, I remember seeing an offhand reference which I can't find anymore. But even so, remember I am not claiming that QSC did anything wrong: basing a design on an expired patent is exactly how things should work, and there is plenty of original engineering work in the RMX series amps that QSC should be justifiably proud.

Interestingly, it seems Behr is not the only one out there copying the RMX. The Tapco J-series and Mackie FRS are also clones, but with a bigger, better toroid in the power supply. Crown LPS is also reputed to be a copy.

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