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495 Search Results Found |
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Forum: Speaker «»
Posted on: Tue, 30 June 2009 22:02 «»
By: Wayne Parham
Re: Two midbass horn layouts...
There are a lot of ways to skin a cat. But as for me, I try to keep the sound sources above the Schroeder frequency spaced so they sum constructively through a fairly large vertical arc which means relatively tight vertical spacing. The crossover shoul...
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Forum: Pi Speakers «»
Posted on: Tue, 30 June 2009 16:15 «»
By: Wayne Parham
Re: Help please ... from the bottom up
Response for the tower two π speaker looks like this:
This is a pseudo-anechoic measurement, so the bass isn't shown. The towers have nice, deep, full bass though. To put numbers on it, f3 is 40Hz and f10 is about 30Hz.
Its impedance curve ...
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Forum: LSAF «»
Posted on: Sat, 20 June 2009 18:37 «»
By: Wayne Parham
Re: Reports from LSAF '09
Thanks for saying, Dave. I appreciate that from you.
I have the exact same system this year I did last year, but this time I brought subs. Helps to smooth the room modes.
You know, This year I don't know where everyone is. Shane might. He prett...
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Forum: Pi Speakers «»
Posted on: Wed, 10 June 2009 11:58 «»
By: Wayne Parham
Re: 2Pi Towers - potential mods
There are two issues, which I'll describe in more detail below. One is the cabinet size and the other is the position of the port and woofer relative to the cabinet walls. Cabinet size sets Helmholtz frequency, as does port size. That determines bass re...
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Forum: Pi Speakers «»
Posted on: Mon, 01 June 2009 19:13 «»
By: PaulW
7 Pi treble edge!
Having built the 7's and enjoyed the results enormously but (there's always a 'but' isn't there?) for one issue, those in room bass modes causing poor, indistinct and boomy bass at certain frequencies. I tried Wayne's multi-sub approach by borrowing a few ...
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Forum: Speaker «»
Posted on: Sat, 23 May 2009 22:03 «»
By: Wayne Parham
My personal opinions of various design philosophies
I have measured and heard the difference from a horn with mouth roundover compared with another similar horn with a sharp terminating edge. I should say right off that this is not always the case, and specifically, if used at a high enough crossover the...
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Forum: Pi Speakers «»
Posted on: Mon, 04 May 2009 12:05 «»
By: Wayne Parham
Re: 2nd pic
Carpeting works wonders for the floor, in my opinon. The pad and the carpet do a pretty good job of reducing HF floor reflection.How does the room sound when you clap your hands? Walk around the room and listen for ringing spots. Sometimes those angled...
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Forum: Pi Speakers «»
Posted on: Thu, 30 April 2009 13:39 «»
By: Wayne Parham
Re: Boundary conditions and floor bounce
I use a 12dB/octave slope for the low-pass filter to subs. I do not high-pass the mains for home hifi applications. The key here is blending, so overlap is your friend. For subs placed close to the mains, something like 4-8 feet away, I usually use 80-...
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Forum: Pi Speakers «»
Posted on: Sun, 26 April 2009 17:50 «»
By: Wayne Parham
Re: Questions on the 12 and 3 pi subs
Check your mail - I've sent plans.When using subs for prosound, use baltic birch. It's much more durable and it's lighter than MDF too.You decision about whether to use one 12π hornsub or a small group (say four) of the three π subs should be entirely di...
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Forum: Pi Speakers «»
Posted on: Sat, 18 April 2009 19:34 «»
By: Wayne Parham
Re: General evaluation of midrange drivers
The π midhorn is the result of about a year of modeling and testing, cutting prototypes and retesting, using what seems like a hundred drivers. In truth, I think I tried probably twenty canidates or so. I've tried a few drivers since the introduction o...
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