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275 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Sat, 16 January 2021 11:13 «»
By: Wayne Parham
Re: 2 Pi tower
I wouldn't suggest making any change to box dimensions in this model. It "rides the line" between being a transmission line and a bass reflex design. There are both internal standing waves and Helmholtz resonance in play in the bass region, s...
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Forum: Pi Speakers «»
Posted on: Fri, 07 February 2020 08:46 «»
By: Wayne Parham
Re: 8pi plans
You've got mail too!
The impedance curve is similar to a traditional reflex box, with a couple bumps down near the Helmholtz frequency and the smooth above that.
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Forum: Pi Speakers «»
Posted on: Mon, 09 December 2019 12:25 «»
By: Wayne Parham
Re: 4PI Plans Request
I think that's a good way to go. Run the flanking subs with a 100Hz/2nd-order low-passed copy of the signal sent to the main speaker each sub is flanking. Run the mains set to "large" so you blend with the flanking subs. The mains should be ...
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Forum: Speaker «»
Posted on: Tue, 18 June 2019 14:49 «»
By: Wayne Parham
Re: WinISD 0.44
That's approximately the same size box I run. It sounds great in that size box. I tune mine a little below that, which as you said, gives the system an overdamped alignment. I like that because thermal shifts don't push towards underdamping, but rathe...
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Forum: Pi Speakers «»
Posted on: Sat, 10 November 2018 11:15 «»
By: Wayne Parham
Re: Aperiodic loading
I've made a lot of measurements with damping material placed in different positions within the cabinet. My goal was to find what effects placement had on damping various frequency ranges; Specifically, I hoped to reduce internal standing waves.
What...
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Forum: Pi Speakers «»
Posted on: Tue, 03 July 2018 14:20 «»
By: Wayne Parham
Re: Alternate port shape for Four Pi cabinet
Look at the following two threads:
Altering dimensions
Cabinet design, port placement and internal standing wavesIn the second thread, there is a modified design that was tested and so I feel comfortable with it. The builder's name is Nick, and he use...
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Forum: Pi Speakers «»
Posted on: Mon, 21 May 2018 09:58 «»
By: Wayne Parham
Re: DSP for subwoofer(s)
I've run vinyl for decades, and still do. I always thought it was kind of fun to crank up the speakers and watch the cones move at VLF where they are unloaded in vented cabs. Long before the days of computer modeling programs, I noticed some (too small...
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Forum: Pi Speakers «»
Posted on: Sat, 19 May 2018 12:41 «»
By: Wayne Parham
Re: DSP for subwoofer(s)
You're right - the main thing is number and placement of subs.
I understand that you want to use a DSP crossover because it gives you the ability to choose any crossover point and slope you want, so will be easy to set the requisite ~90Hz second-order...
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Forum: Pi Speakers «»
Posted on: Sat, 11 November 2017 10:36 «»
By: Wayne Parham
Re: New 3Pi build
I love Crown amps and have a couple of them myself. I prefer the older Class AB amps to the Class D amps, but I'll bet if I was lugging them around for gigs I might change my mind. But they're great for all-out SPL, and your speakers will love them.
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Forum: Speaker «»
Posted on: Thu, 15 June 2017 15:23 «»
By: Wayne Parham
Re: Eminence Delta Pro 8-A in a JBL AM6200-64 horn project
Do searches here because you'll find a lot of information about horn loaded loudspeakers and how to design them.
I will tell you this for starters: A horn is really maxxed out at a decade, which is a little over two octaves. So if you plan to horn-l...
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