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40hz High Pass (Low Cut) Filter

#1 User is offline   warrenstuart 

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Posted 25 October 2010 - 04:39 PM

Can anybody recommend a filter or processor to do this job?

I know various maufacturers do graphic equalisers with 40hz low cut filters as standard but the majority of them seem to be out of China and quite cheap, I had a KAM 2 x 15 band EQ once and it just generally degraded the sound quality even in bypass mode. I also don't need a graphic equaliser so a bit of a waste of money and rack space to go down this route unless anyone can recommend a decent one.
QSC do quite a few amplifiers with them built in but again even more expense.

There's a company in the US who do in-line passive filters built into a phono plug/socket module but I can't find anybody in the UK who sells them.

The other option is make one I guess, something I'm capable of doing but don't really have the time.

All suggestions welcome please :-)

#2 User is offline   Dan Gruner 

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Posted 25 October 2010 - 05:29 PM

This may be an option...

Presonus Eq3B
http://www.studiospares.com/equalisers/pre...avOgDfAkw%3D%3D

Although it doesnt have a 40Hz HPF (only 80Hz HPF), it offers a 3-band fully parametric EQ, which may be more useful than a straightforward HPF anyway.

Nice little units..
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#3 User is offline   Sound Man 

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Posted 25 October 2010 - 07:05 PM

How about a Behringer Shark, that has a variable cut off frequency.

David
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#4 User is offline   Dave SA 

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Posted 25 October 2010 - 10:41 PM

What's the full signal chain and application?

#5 User is offline   warrenstuart 

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Posted 26 October 2010 - 08:28 AM

View PostDave SA, on 25 Oct 2010, 11:41 PM, said:

What's the full signal chain and application?


Thanks for your replies so far.
I should have given a bit more information I think, I need 2 channel (stereo) and the application is disco so signal chain is mixer - power amp - speakers (2 x 15" & horn). I just want to try removing the low frequencies the speakers aren't capable of reproducing and give a bit more head room.

Thanks.

#6 User is offline   Scottish_AV_in London 

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Posted 26 October 2010 - 08:44 AM

What Brand and Model of Speakers / Amp do you have??
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#7 User is offline   Simon Lewis 

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Posted 26 October 2010 - 08:55 AM

Usually, the high pass filter is part of "something else" - a crossover, graphic / parametric EQ or loudspeaker management system. The Behringer Sharc is fairly cheap (50 ish?) so two wouldn't break the bank, but my limited experience of them has not been too positive.

I appreciate you do not want to lose rack space or spend too much, but a Behringer DCX2496 would be worth considering. It takes 1U of space (the Sharcs are taller and require an additional tray), sounds OK and has extra features that could be used to protect or enhance your system (limiting etc.). Cost is around 220 upwards from the usual suspects.

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#8 User is offline   warrenstuart 

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Posted 27 October 2010 - 08:45 AM

Thanks for the replys everyone and here's some answers to a couple of posts:

It looks like it's going to be a 1U graphic equaliser or speaker management system from looking around and the advice on here. The EQs seem to vary from about 80 to a few hundred pounds but quite a few of them look suspiciously like they are the same unit inside?! Any expereince or advice here welcomed please??

The amp is a C-MARK MR2450 (soon to be replaced as it's so bloody heavy) and the speakers are EV ZX4.

I once saw a 1U EV signal processor go for 80 on e-bay that if I remember correctly did fixed curve EQ and subsonic filtering etc but I can't remember what it's model number and/or name was!?? I can remember the listing saying "this made my speakers sound amazing" but I can't remember anymore about it.

Warren.

#9 User is offline   Sound Man 

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Posted 27 October 2010 - 10:07 AM

View Postwarrenstuart, on 27 Oct 2010, 8:45 AM, said:

The amp is a C-MARK MR2450 (soon to be replaced as it's so bloody heavy).


If that's the case, why not simply pick a used QSC amplifier, i.e. something like the PLX range. They have switch mode power supplies and are very light in weight.

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#10 User is offline   warrenstuart 

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Posted 27 October 2010 - 10:42 AM

View PostSound Man, on 27 Oct 2010, 10:07 AM, said:

View Postwarrenstuart, on 27 Oct 2010, 8:45 AM, said:

The amp is a C-MARK MR2450 (soon to be replaced as it's so bloody heavy).


If that's the case, why not simply pick a used QSC amplifier, i.e. something like the PLX range. They have switch mode power supplies and are very light in weight.

David


That sort of ticks all the boxes in one really doesn't it, lighter amp, built in filter, no extra units to carry around... thanks.

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