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77 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Tue, 07 January 2020 11:27 «»
By: Wayne Parham
Re: PI 2
Fore-aft driver offsets naturally shift the forward lobe centerline. But when I've measured one Pi and two Pi speakers that had drivers mounted flush and compared those with surface mounted drivers - with about 3/8" difference in the fore-aft offse...
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Forum: Room Acoustics «»
Posted on: Wed, 04 October 2017 15:59 «»
By: Wayne Parham
Re: Small-room acoustics
Actually, small rooms are harder to work with than larger rooms. The reflections and room modes are more intense in a small room. Speakers that can provide uniform directivity help reduce problems in the reverberent field, above around 200Hz, and as yo...
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Forum: Pi Speakers «»
Posted on: Wed, 12 June 2013 10:16 «»
By: Wayne Parham
Re: Uniform Directivity - How important is it?
Based on my observations over the years, I have made three basic assumptions that largely drive my design choices:
My first working assumption is that speakers with constant beamwidth always sound better than speakers that don't, provided everything e...
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Forum: Pi Speakers «»
Posted on: Mon, 20 May 2013 13:13 «»
By: Wayne Parham
Uniform Directivity - How important is it?
I must say that I'm in the middle on this subject of directivity and how much it matters. Back when directivity wasn't even considered by most audiophiles, I made more a point of discussing its importance. But now that constant directivity has become m...
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Forum: Pi Speakers «»
Posted on: Sat, 31 December 2011 18:28 «»
By: Wayne Parham
Re: how'd we get here (or where is this)?
Yeah, you're right. I found this path three decades ago and never looked back. There are other design types that have come and gone, the darlings of the day for audiophiles. But in this approach, I've never wavered. It's the best way to build loudspe...
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Forum: Pi Speakers «»
Posted on: Fri, 09 September 2011 00:22 «»
By: Wayne Parham
Re: Contemplating a change
Well, I guess it's no surprised I'm biased, but then again, the trend towards uniform directivity among experts is clear. Controlled, uniform directivity is always welcomed, but in a small room, it's even more important because reflections are so much s...
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Forum: Measurement «»
Posted on: Fri, 29 July 2011 01:46 «»
By: Wayne Parham
Re: The Acoustic Center: How it applies to Loudspeaker Measurements
Absolutely. At midrange frequencies up, the reverberent field is usually almost as loud as the direct sound. So the loudspeaker's polar response is important, because sound radiating in all directions provides the energy for the reverberent field. You...
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Forum: Pi Speakers «»
Posted on: Mon, 27 December 2010 10:12 «»
By: Wayne Parham
Re: Constant directivity verses on-axis EQ for non-uniform directivity (aka baffle step filters)
Glad it was helpful. I hope it made sense and wasn't too abstract.
I find myself getting a lot of the same questions and comments over the years, and I tend to link to past posts in reply. I had a list of about a dozen posts that sort of covered the...
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Forum: Pi Speakers «»
Posted on: Fri, 02 July 2010 15:02 «»
By: Wayne Parham
Crossover optimization for DI-matched two-way speakers, revisited
I usually fine-tune the position of the forward lobe by adjusting the low-pass circuit slightly. I know within about 10° where the centerline of the forward lobe will be before I start, because of mathematical models or previous design efforts or both. ...
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Forum: Pi Speakers «»
Posted on: Thu, 10 June 2010 13:07 «»
By: Wayne Parham
Woofer size for uniform directivity loudspeakers
Personally, I wouldn't go to a 10" driver. In my experience, there is too much midrange off-axis, and it makes a bad directivity match. Also, they usually don't have high enough sensitivity for my tastes unless tuned as a dedicated midrange. For ...
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