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142 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Thu, 29 November 2012 12:58 «»
By: Wayne Parham
Re: Flanking Subs vs Helper Woofers
Flanking subs do not get a summed signal - They get the same signal as the main speaker they are flanking, with a low-pass filter applied. They're stereo subs. That's one of the key distinctions between flanking subs and more distant distributed subs in ...
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Forum: Pi Speakers «»
Posted on: Sat, 10 November 2012 22:33 «»
By: Wayne Parham
Re: 4 PI by Andy
There's nothing gained by the angled baffle, it's just a really cool looking box, in my opinion. Way back when I had Bill Martinelli making our cabinets, I asked him to build these subs as a plain-ol' 10ft3 box and this is what he came up with for me in...
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Forum: Pi Speakers «»
Posted on: Thu, 08 November 2012 15:45 «»
By: Wayne Parham
π Constant Directivity Cornerhorn: Bass Bin Design Details
I did consider making the bass bin of my constant directivity cornerhorns using a folded horn, like the 12π hornsub. But upon careful considerations, I found a lot of disadvantages in that approach. These considerations are described in some detail in ...
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Forum: Pi Speakers «»
Posted on: Mon, 24 September 2012 15:24 «»
By: Wayne Parham
Re: Six Pi Review
Understood and agreed. I think most people familiar with the multisub concept know that the more bass speakers you use, the smoother the modal range becomes. And under 100Hz, it almost doesn't matter where you put the woofers if you have four or more...
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Forum: Pi Speakers «»
Posted on: Thu, 21 June 2012 11:07 «»
By: Wayne Parham
Re: 4PI Cabinet plans / question
I do not think it is valid to consider sealed mains to be easier to integrate with multisubs. In fact, I'd say this presumption goes against the whole multisub concept, which is to blend sound sources having various phase relationships and physical loca...
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Forum: Pi Speakers «»
Posted on: Thu, 21 June 2012 10:18 «»
By: zheka
Re: 4PI Cabinet plans / question
what is the down side of doing sealed versions of 4PIs other than higher LF roll-off point? why do you not recommend going sealed for the L/R speakers?
It is often said that sealed mains are easier to integrate in multisub setups when mains and subs...
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Forum: Pi Speakers «»
Posted on: Wed, 29 February 2012 14:08 «»
By: Wayne Parham
Re: High-pass on the 4pi?
High-pass at the Helmholtz frequency of the mains. The multisub configuration is not limited to direct radiators, but can be employed with hornsubs as well. Delay on the mains is really used to match the acoustic centers, to compensate for the extra de...
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Forum: Pi Speakers «»
Posted on: Sat, 07 January 2012 14:13 «»
By: Wayne Parham
Re: Subs as 3pi stands?
If putting the mains on top of the woofers is all you can do, then you can't take advantage of modal smoothing using multiple sound sources. The mains and the subs will sum the same (either in phase or out of phase, depending on how they're connected). ...
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Forum: Pi Speakers «»
Posted on: Mon, 19 December 2011 15:02 «»
By: Wayne Parham
Re: One Cubic Foot Subs
You're so right. Hoffman's "Iron Law" (the one that says you can have two of three: deep bass, small size or efficiency) actually was a precursor to Thiele and Small's work. It's not just a seat of the pants thing, it's actually a quantifiabl...
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Forum: Pi Speakers «»
Posted on: Mon, 24 October 2011 21:21 «»
By: Wayne Parham
Re: Helper Woofer Location
Modeling won't show what we're trying to accomplish unless you do a room simulation. Most software I know of simulates a speaker in anechoic space or some simple radiating angle (e.g. halfspace). Room simulation software tends to see the source as a si...
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