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Helmholtz frequency of each model [message #69505 is a reply to message #69500]

Fri, 16 September 2011 09:41

Wayne Parham
Messages: 18678
Registered: January 2001

Illuminati (33rd Degree)

It occurred to me that it might be helpful to list the Helmholtz frequency of each model here for reference. You can high-pass at this frequency to limit excursion where the driver is unloaded. There is very little sound produced below this frequency anyway.

one π loudspeaker - 60Hz
two π loudspeaker - 40Hz
three π loudspeaker - 30Hz
four π loudspeaker - 40Hz
six π loudspeaker - 30Hz
seven π loudspeaker - 40Hz
eight π loudspeaker - 30Hz
three π subwoofer - 20Hz

Again, for home hifi or home theater, I do not suggest high-passing the mains above this point. We want to blend the mains and the subs for modal smoothing. But there's no harm high-passing at the Helmholtz frequency because no sound is produced below that. These speakers have pretty stiff suspensions, so low frequencies aren't going to rattle them to death but high-pass at the Helmholtz frequency is a good idea anyway. Not required, but beneficial.

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[Message index]

		1pi or 2pi for surrounds? By: smokarz on Mon, 08 August 2011 08:52
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Mon, 08 August 2011 11:34
		Re: 1pi or 2pi for surrounds? By: smokarz on Mon, 08 August 2011 11:49
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Mon, 08 August 2011 14:18
		Re: 1pi or 2pi for surrounds? By: smokarz on Mon, 08 August 2011 14:46
		Re: 1pi or 2pi for surrounds? By: justphil on Tue, 09 August 2011 21:40
		Re: 1pi or 2pi for surrounds? By: smokarz on Wed, 10 August 2011 07:52
		Re: 1pi or 2pi for surrounds? By: justphil on Wed, 10 August 2011 08:12
		Re: 1pi or 2pi for surrounds? By: smokarz on Wed, 10 August 2011 09:59
		Re: 1pi or 2pi for surrounds? By: justphil on Wed, 10 August 2011 18:39
		Re: 1pi or 2pi for surrounds? By: smokarz on Tue, 16 August 2011 12:32
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Tue, 16 August 2011 14:52
		Re: 1pi or 2pi for surrounds? By: smokarz on Mon, 22 August 2011 10:02
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Mon, 22 August 2011 10:15
		Re: 1pi or 2pi for surrounds? By: smokarz on Fri, 26 August 2011 12:16
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Fri, 26 August 2011 12:40
		Re: 1pi or 2pi for surrounds? By: smokarz on Fri, 26 August 2011 12:46
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Fri, 26 August 2011 13:29
		Re: 1pi or 2pi for surrounds? By: smokarz on Sat, 27 August 2011 08:26
		Re: 1pi or 2pi for surrounds? By: justphil on Sat, 27 August 2011 08:48
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Sat, 27 August 2011 09:32
		Re: 1pi or 2pi for surrounds? By: smokarz on Sat, 27 August 2011 09:28
		Re: 1pi or 2pi for surrounds? By: smokarz on Sat, 27 August 2011 09:36
		Re: 1pi or 2pi for surrounds? By: justphil on Sat, 27 August 2011 09:53
		Re: 1pi or 2pi for surrounds? By: smokarz on Sat, 27 August 2011 10:27
		Re: 1pi or 2pi for surrounds? By: justphil on Sat, 27 August 2011 10:55
		Re: 1pi or 2pi for surrounds? By: smokarz on Tue, 30 August 2011 21:55
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Tue, 30 August 2011 22:40
		Re: 1pi or 2pi for surrounds? By: smokarz on Wed, 31 August 2011 08:54
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Wed, 31 August 2011 10:52
		Re: 1pi or 2pi for surrounds? By: smokarz on Wed, 31 August 2011 12:20
		Re: 1pi or 2pi for surrounds? By: smokarz on Tue, 06 September 2011 09:05
		Re: 1pi or 2pi for surrounds? By: justphil on Tue, 06 September 2011 09:24
		Re: 1pi or 2pi for surrounds? By: smokarz on Tue, 06 September 2011 10:20
		Re: 1pi or 2pi for surrounds? By: smokarz on Tue, 06 September 2011 12:50
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Tue, 06 September 2011 15:46
		Re: 1pi or 2pi for surrounds? By: smokarz on Tue, 06 September 2011 20:24
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Tue, 06 September 2011 21:42
		Re: 1pi or 2pi for surrounds? By: smokarz on Thu, 08 September 2011 10:10
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Thu, 08 September 2011 11:37
		Re: 1pi or 2pi for surrounds? By: smokarz on Thu, 08 September 2011 15:06
		Re: 1pi or 2pi for surrounds? By: smokarz on Sat, 10 September 2011 11:39
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Sat, 10 September 2011 16:32
		Re: 1pi or 2pi for surrounds? By: smokarz on Mon, 12 September 2011 21:57
		Re: 1pi or 2pi for surrounds? By: jshupe on Wed, 08 January 2014 21:21
		Re: 1pi or 2pi for surrounds? By: smokarz on Mon, 12 September 2011 21:58
		Re: 1pi or 2pi for surrounds? By: smokarz on Mon, 12 September 2011 22:01
		Re: 1pi or 2pi for surrounds? By: justphil on Tue, 13 September 2011 09:36
		Re: 1pi or 2pi for surrounds? By: smokarz on Tue, 13 September 2011 09:57
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Tue, 13 September 2011 10:29
		Re: 1pi or 2pi for surrounds? By: smokarz on Tue, 13 September 2011 10:59
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Tue, 13 September 2011 14:15
		Re: 1pi or 2pi for surrounds? By: smokarz on Tue, 13 September 2011 21:10
		Re: 1pi or 2pi for surrounds? By: smokarz on Wed, 14 September 2011 21:08
		Re: 1pi or 2pi for surrounds? By: smokarz on Wed, 14 September 2011 21:17
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Wed, 14 September 2011 22:10
		Re: 1pi or 2pi for surrounds? By: smokarz on Thu, 15 September 2011 07:39
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Thu, 15 September 2011 07:49
		Re: 1pi or 2pi for surrounds? By: smokarz on Thu, 15 September 2011 08:14
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Thu, 15 September 2011 10:25
		Re: 1pi or 2pi for surrounds? By: smokarz on Thu, 15 September 2011 11:32
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Thu, 15 September 2011 12:35
		Helmholtz frequency of each model By: Wayne Parham on Fri, 16 September 2011 09:41
		Re: 1pi or 2pi for surrounds? By: smokarz on Fri, 16 September 2011 18:16
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Fri, 16 September 2011 19:30
		Re: 1pi or 2pi for surrounds? By: smokarz on Sat, 17 September 2011 08:45
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Sat, 17 September 2011 09:00
		Re: 1pi or 2pi for surrounds? By: smokarz on Sat, 17 September 2011 09:16
		Re: 1pi or 2pi for surrounds? By: Wayne Parham on Sat, 17 September 2011 10:45

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