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275 Search Results Found |
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Forum: Speaker «»
Posted on: Fri, 05 August 2016 15:34 «»
By: Wayne Parham
Re: The Science Of Hearing
When one studies physics, they study the properties of waves. Especially when looking at acoustics, you'll see there are standing waves, Helmholtz resonators and all sorts of mechanical and acoustic filters. There are electrical resonators and filters ...
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Forum: Silicon Valley «»
Posted on: Mon, 13 June 2016 16:40 «»
By: Wayne Parham
Re: Crown amp
I generally run the mains full-range unless I'm really pushing the power to them. For home hifi and home theater, no high-pass is needed.
When doing prosound work, I'd recommend high-pass for the mains at the Helmholtz frequency. That's because the ...
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Forum: Speaker «»
Posted on: Wed, 11 November 2015 14:16 «»
By: Wayne Parham
Re: Mono "flanking sub"
For flanking subs to provide smoothing, they need to be blended with the mains, overlapping in the modal range. So run the mains full-range, without a high-pass filter. If the mains are vented, they can optionally have a high-pass set at the Helmholtz ...
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Forum: Speaker «»
Posted on: Thu, 29 October 2015 11:24 «»
By: johnnycamp5
Re: Mono "flanking sub"
I use a plate amp that is attached to the sub itself.
I tend to prefer it set at 50hZ, which many find too low.
I believe the crossover (low pass 50 to 100hZ)slope is 12db.
I use no eq.
I come from a mindset/point of view where, you try to fix the...
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Forum: Pi Speakers «»
Posted on: Sat, 15 August 2015 20:32 «»
By: Wayne Parham
Re: Flanking subs also pulling LFE duty
I would always run the mains large, because it gives more bass sound sources. As you know, the goal is to blend the mains with the flanking subs. But it never hurts to high-pass the mains at their Helmholtz frequency, because there is almost no output ...
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Forum: Pi Speakers «»
Posted on: Tue, 07 July 2015 10:42 «»
By: Wayne Parham
Re: Barzilay 4pi
Sorry, I missed this earlier. The question was asked whether tuning at 38Hz should be modified and increased to 40Hz.
I designed the system for 38Hz tuning. But really, the difference in response that results from a Helmholtz frequency of 40Hz is so...
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Forum: Pi Speakers «»
Posted on: Wed, 16 July 2014 11:22 «»
By: Wayne Parham
Re: Alternatives to Martin King's spreadsheets
When you tune a box to a certain frequency, you're setting Helmholtz (cavity) resonance using box and port size. In T/S simulations, this is known as fb.
Alternatively, one can use 1/4λ (pipe mode) standing wave resonance instead of Helmholtz resonan...
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Forum: Pi Speakers «»
Posted on: Wed, 16 July 2014 10:57 «»
By: Wayne Parham
Re: 2 PI - maximum volume to avoid Helmholtz standing waves
Man, I'd love to have the time to run simulations and fiddle around like I used to. But these days, I'm so backlogged I just can't. If I even said I'd get to it, might be the best of intentions, but I'd be lying. I'm just so slammed with projects, and...
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Forum: Pi Speakers «»
Posted on: Tue, 15 July 2014 19:46 «»
By: JCDC
Re: 2 PI - maximum volume to avoid Helmholtz standing waves
How about a sideways 2Pi:
Hey Wayne, can you crunch the # to see where the best position for the driver and port are?
Cheers,
Jeff
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Forum: Pi Speakers «»
Posted on: Tue, 15 July 2014 16:55 «»
By: CRISTIAN M
Re: 2 PI - maximum volume to avoid Helmholtz standing waves
Thanks!
I will try to keep the enclosure very close to the small bookshelf, and will keep looking for those spreadsheets.
I will let you know my findings
Saludos,
CM
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