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1 Forum: Pi Speakers «» Posted on: Wed, 23 September 2020 14:51 «» By: Wayne Parham
Re: 3Pi and 4Pi Plans Request
I think if you peruse the Pi Speakers FAQ and do searches here in the forum, you'll probably find all the answers to any questions you might have. In particular, you might want to read the H290C Horn/Waveguide thread. It discusses the benefits of tha...
2 Forum: Speaker «» Posted on: Tue, 08 September 2020 13:02 «» By: Wayne Parham
Re: Radian 475PB
That's awesome, Bruce! The forward lobe is right where you want it to be! Nulls roughly equally spaced and far apart, outside the vertical beam. As for the nearby boundaries - side and rear wall - give a helper woofer setup a try. It will provide t...
3 Forum: Pi Speakers «» Posted on: Tue, 02 June 2020 17:43 «» By: Wayne Parham
Re: Corner horn listening distance
Since your room has a front wall span of just under twelve feet across, the best area to listen to the cornerhorns in your room is in the area between about six feet back and twelve feet back from the front wall. You can sit more distant than that and i...
4 Forum: Pi Speakers «» Posted on: Sat, 02 May 2020 13:35 «» By: Wayne Parham
Re: 3Pi or 4Pi?
The three π model is slightly larger than the four π, that's true. Both have similarly sized baffles though, and they're large enough that baffle step happens right about the Schroeder frequency. So below the baffle step, we're in the room's modal regi...
5 Forum: Pi Speakers «» Posted on: Sat, 28 March 2020 10:38 «» By: Wayne Parham
Re: Corner horns & flanking subs?
Constant directivity cornerhorns don't benefit from flanking subs. The anomalies created by reflections from nearest boundaries when using traditional loudspeakers don't occur in cornerhorn installations. The sound source is acoustically close to the n...
6 Forum: Pi Speakers «» Posted on: Mon, 17 February 2020 11:19 «» By: Wayne Parham
Re: Three Pi and Three Pi Sub Plans
I've always loved ribbon tweeters too. Back in the 1970s, the EMIT tweeters in Infinity speakers were oh-so sweet to me. They offered much greater extension than compression drivers of that era. But they lacked dynamic range. They were relatively fra...
7 Forum: Pi Speakers «» Posted on: Mon, 30 December 2019 11:11 «» By: Wayne Parham
Re: 4PI Plans Request
You've got mail! We all love to see build threads. So please create one and post often! As for the mods you are considering, I am glad you understand the potential for anomalies from standing wave modes in large full-range cabinets. That knowledg...
8 Forum: Pi Speakers «» Posted on: Mon, 09 December 2019 16:45 «» By: Wayne Parham
Re: 4PI Plans Request
The flanking sub low-pass recommendation of 100Hz second-order is empirical, so you can consider it a starting point and not a hard-fixed number. However, I have found that the slope is always better being gradual than it is being sharper. Fourth-order...
9 Forum: Pi Speakers «» Posted on: Fri, 11 October 2019 13:16 «» By: Wayne Parham
Re: Definimax 4012HO - End of Life
Check out this document from Eminence's website: Understanding Loudspeaker Data It shows what each of the electro-mechanical parameters describe. As for flanking sub setup, generally, we want 100Hz, second-order. I've found some combinations that a...
10 Forum: Pi Speakers «» Posted on: Mon, 07 October 2019 09:07 «» By: Wayne Parham
Re: Definimax 4012HO - End of Life
Do not forget that this design almost requires flanking subs for deep bass response. You can consider it to be a three-way design with the woofers detached. They are adequate without subs, but certainly not optimal. They get better bass extensio...
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