low-pass crossover suggestions

Telstar · 16th November 2008, 09:51 PM

I'm looking to build (or better, have built) a low-pass crossover cut at around 80hz. I would like some advice on how to make it.
Thanks.

zoranaudio · 16th November 2008, 10:38 PM

You will loose a lot of power, and that thing will be massive like one bass driver, try other way , active.

Telstar · 16th November 2008, 10:59 PM

Quote:

Originally posted by zoranaudio
You will loose a lot of power, and that thing will be massive like one bass driver, try other way , active.

I'm asking which alternatives I have to NOT go active.

tinitus · 16th November 2008, 11:50 PM

Bandpass cabinet...acoustic lowpass filter

Borus · 17th November 2008, 01:04 AM

You might look into a higher Hz cross over point and then control the output from the woofer with the Enclosure. I mean maybe 180hz with the passive components to save power and complexity in the crossover but make a box that can absorb the next 100hz your looking for. You can find info on this concept at the auto-sound web sites.

Borus

"YA but what does he know anyway"

peter_m · 17th November 2008, 02:36 AM

An option to go active: http://www.htguide.com/forum/showthr...tive+crossover

Peter

BHTX · 17th November 2008, 03:37 AM

Good link Peter. Several options discussed there.
And those "cheap" Behringer units do work well, especially for what they cost!
To most people, it's probably worth the price just for using the first variable lowpass crossover to use for subwoofer(s).

Telstar · 17th November 2008, 10:45 AM

Quote:

Originally posted by tinitus
Bandpass cabinet...acoustic lowpass filter

Quote:

Originally posted by Borus
You might look into a higher Hz cross over point and then control the output from the woofer with the Enclosure. I mean maybe 180hz with the passive components to save power and complexity in the crossover but make a box that can absorb the next 100hz your looking for. You can find info on this concept at the auto-sound web sites.

I forgot to say that the speakers will be entirely Open Baffle, so I cannot and dont want to play with cabinet resonance. I will be using 2x 15" Hawrhorne Augies (or 4x 10") for 30-80/90/100 range.
I'm definitely NOT going above 100hz.

So, how big would such crossover be?
The budget would be <500€ for each.

I found this site:
http://www.apicsllc.com/apics/Misc/filter2.html

BTW, if someone can point me to some writeup of different types of crossover filters, I would be glad.

sreten · 17th November 2008, 11:40 AM

Hi,

Read up MJK's open baffle articles here : http://quarter-wave.com/

/sreten.

Cal Weldon · 17th November 2008, 02:13 PM

For the price of the passive components, you could buy a plate amp.

16th November 2008, 09:51 PM	#1
Telstar diyAudio Member Join Date: Dec 2007	low-pass crossover suggestions I'm looking to build (or better, have built) a low-pass crossover cut at around 80hz. I would like some advice on how to make it. Thanks. __________________ The response of the inner ear extends to at least 200khz - Dr W. Tempest

16th November 2008, 10:38 PM	#2
zoranaudio diyAudio Member Join Date: Jun 2008	You will loose a lot of power, and that thing will be massive like one bass driver, try other way , active. __________________ zaudio

17th November 2008, 01:04 AM	#5
Borus diyAudio Member Join Date: Mar 2004 Location: east cost	other way You might look into a higher Hz cross over point and then control the output from the woofer with the Enclosure. I mean maybe 180hz with the passive components to save power and complexity in the crossover but make a box that can absorb the next 100hz your looking for. You can find info on this concept at the auto-sound web sites. Borus "YA but what does he know anyway" __________________ "Ya but what does he know anyhow"

17th November 2008, 02:13 PM	#10
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	For the price of the passive components, you could buy a plate amp. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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16th November 2008, 11:50 PM	#4
tinitus diyAudio Moderator Join Date: Nov 2005	Bandpass cabinet...acoustic lowpass filter

17th November 2008, 02:36 AM	#6
peter_m diyAudio Member Join Date: May 2007	An option to go active: http://www.htguide.com/forum/showthr...tive+crossover Peter

17th November 2008, 03:37 AM	#7
BHTX diyAudio Member Join Date: Feb 2006	Good link Peter. Several options discussed there. And those "cheap" Behringer units do work well, especially for what they cost! To most people, it's probably worth the price just for using the first variable lowpass crossover to use for subwoofer(s).

17th November 2008, 11:40 AM	#9
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, Read up MJK's open baffle articles here : http://quarter-wave.com/ /sreten.

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