Is it reasonable to have a sub go from 20 to 120hz?

bluegti · 15th September 2006, 07:44 PM

I'm trying to plan out a system for my home theater - really more of a 11x14 foot media room. I built 3 full range monitors (my first project) that extend to 100hz at the lowest. I would like to fill in the bass with two subwoofers but am not sure about how high I can expect a subwoofer to go. Would 100-120hz be reasonable?

Next, I'm trying to figure out what type of enclosure to use. I am thinking I might like to build something that is sort of a speaker stand/subwoofer in one - not unlike the Von Schweikert VR4 Jr.

http://www.vonschweikert.com/vr4jr.html

A shove in the right direction is appreciated.

badman · 15th September 2006, 08:08 PM

If you put the sub near the satellite, or use it as a stand, you can run the sub as high as you want (front-firing sub please)- so long as it still sounds good.

tool49 · 15th September 2006, 08:08 PM

As far as I'm concerned, your sub can go as high as you want it. All you need to do is make sure the drivers you chose are appropriate for the job you appoint them. Now for sure going all the way up to 100hz is not going to be easily achieved by a heavy 21" woofer but I see no problem with an 8" or 10". Then you end up loosing on the bottom end on things. Going down to 20Hz flat from 100Hz might be a stretch, but if you account room gain it should be easily achieveable. A bit of equing might just very well do the trick (i.e. Linkwitz transform)

Hope this helps!
Sébastien

HipoFutura · 15th September 2006, 09:23 PM

You're OK at 100hz, but a tad on the high side. It will depend upon your driver and cabinet design. You're going to need quite a large enclosure in order to get 20hz without a huge db drop. What driver are you using? Is cabinet size an issue?

owdi · 15th September 2006, 10:44 PM

Since you are using stereo subs, I think 120hz is very reasonable. The Dayton RS series of subwoofers seem to be espeically suitable to higher crossover points. ref

Dan

hooha · 18th September 2006, 01:13 AM

Those look like a rip from Wilson's with a superior cabinet finish...

As the others have mentioned, 120Hz should be no problem for a 12". It's not for my MAW-12's which were designed for sound quality...

Mark

15th September 2006, 07:44 PM	#1
bluegti diyAudio Member Join Date: Nov 2004 Location: Northern Virginia	Is it reasonable to have a sub go from 20 to 120hz? I'm trying to plan out a system for my home theater - really more of a 11x14 foot media room. I built 3 full range monitors (my first project) that extend to 100hz at the lowest. I would like to fill in the bass with two subwoofers but am not sure about how high I can expect a subwoofer to go. Would 100-120hz be reasonable? Next, I'm trying to figure out what type of enclosure to use. I am thinking I might like to build something that is sort of a speaker stand/subwoofer in one - not unlike the Von Schweikert VR4 Jr. http://www.vonschweikert.com/vr4jr.html A shove in the right direction is appreciated.

15th September 2006, 08:08 PM	#2
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	If you put the sub near the satellite, or use it as a stand, you can run the sub as high as you want (front-firing sub please)- so long as it still sounds good. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

18th September 2006, 01:13 AM	#6
hooha diyAudio Member Join Date: Apr 2005 Location: Winnipeg, Manitoba	Those look like a rip from Wilson's with a superior cabinet finish... As the others have mentioned, 120Hz should be no problem for a 12". It's not for my MAW-12's which were designed for sound quality... Mark __________________ Breaking speed records - http://www.mach5audio.com

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15th September 2006, 08:08 PM	#3
tool49 diyAudio Member Join Date: Apr 2003 Location: Montreal	As far as I'm concerned, your sub can go as high as you want it. All you need to do is make sure the drivers you chose are appropriate for the job you appoint them. Now for sure going all the way up to 100hz is not going to be easily achieved by a heavy 21" woofer but I see no problem with an 8" or 10". Then you end up loosing on the bottom end on things. Going down to 20Hz flat from 100Hz might be a stretch, but if you account room gain it should be easily achieveable. A bit of equing might just very well do the trick (i.e. Linkwitz transform) Hope this helps! Sébastien

15th September 2006, 09:23 PM	#4
HipoFutura diyAudio Member Join Date: Jun 2006	You're OK at 100hz, but a tad on the high side. It will depend upon your driver and cabinet design. You're going to need quite a large enclosure in order to get 20hz without a huge db drop. What driver are you using? Is cabinet size an issue?

15th September 2006, 10:44 PM	#5
owdi diyAudio Member Join Date: Sep 2003 Location: Bellevue, WA	Since you are using stereo subs, I think 120hz is very reasonable. The Dayton RS series of subwoofers seem to be espeically suitable to higher crossover points. ref Dan

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