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1 Forum: Pi Speakers «» Posted on: Tue, 23 August 2022 09:09 «» By: Wayne Parham
Re: My 3π adventure
I meant to add some comments about the Helmholtz frequency in each of my responses above, but forgot. It was more important to me to discuss the use of flanking subs and multisubs, and the reasons for needing them. So I became involved in those respons...
2 Forum: Pi Speakers «» Posted on: Mon, 22 August 2022 18:33 «» By: Wayne Parham
Re: My 3π adventure
I like symmetrical multisubs, which is a Welti arrangement. You can use such an arrangement and also include flanking subs. Place the mains with flanking subs outboard. They are just a little behind, beside and below the mains. They are stereo subs...
3 Forum: Pi Speakers «» Posted on: Mon, 22 August 2022 17:01 «» By: Wayne Parham
Re: My 3π adventure
Measured in-room, I think your response curves are pretty good. This is typical in-room response. Looks to me like all is working as designed. In-room measurements show the room more than they do the speakers. But having a waveguide speaker really ...
4 Forum: Pi Speakers «» Posted on: Fri, 28 January 2022 12:13 «» By: Wayne Parham
Re: 4Pi - alternate compression driver mounting?
The quality of your environment will be reflected in the quality of your measurements. Oh, such a pun in that sentence. For measurement charts that will be published, I would recommend no less than 30 feet of unobstructed reflection-free area. O...
5 Forum: Home Theater «» Posted on: Tue, 14 December 2021 09:15 «» By: Wayne Parham
Re: Home Theater for the Outdoors
Actually, outdoors, one thing in your benefit is there are no room modes. And if your setup is far enough away from buildings, then there are no early reflections. That's a significant advantage, acoustically. Of course, you'll probably need more powe...
6 Forum: Home Theater «» Posted on: Mon, 06 December 2021 09:02 «» By: Wayne Parham
Re: I want to convert my basement
If your basement has all concrete walls, you will definitely want to invest in some room treatments. I would line the walls with panel absorbers. Otherwise, you'll have worst-case room modes and lots of MF and HF reflections too. The acoustics in a ba...
7 Forum: Pi Speakers «» Posted on: Sun, 16 May 2021 09:16 «» By: Wayne Parham
Re: four Pi and subs
Compression driver changes sometimes need different R1/R2 values to match voltage sensitivity. The amplitude and polar response is set by the waveguide, which is has much more influence than the driver. The only things set by the driver are mass-roll...
8 Forum: Pi Speakers «» Posted on: Tue, 02 February 2021 09:16 «» By: Wayne Parham
Re: 3pi update / 6pi build
Yes, standing waves occur at frequencies between 30Hz and 120Hz. That's what room modes are and they can be quite troublesome. It's what the multisub configuration is designed to mitigate. But to create standing waves in the bass requires a large en...
9 Forum: Pi Speakers «» Posted on: Wed, 27 January 2021 09:45 «» By: Wayne Parham
Re: Pi Studio One Tower
I like the whole concept of the 2.5-way speaker very much. It's the best and most natural way to resolve baffle step, in my opinion. Of course, that means running the lower "helper" woofer up to the baffle step frequency. This brings me to...
10 Forum: Pi Speakers «» Posted on: Tue, 26 January 2021 11:19 «» By: Wayne Parham
Re: 3pi update / 6pi build
That's an excellent idea. Highly encouraged! I think you would probably get deeper bass from a driver like the LAB12. But flanking subs are mostly for the upper midbass anyway, for providing baffle step correction, and for mitigating SBIR and higher...
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