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1 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...
2 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...
3 Forum: Pi Speakers «» Posted on: Thu, 24 December 2020 09:38 «» By: Wayne Parham
Re: Flanking subs with multi-sub optimizer, and other questions
Sounds good. I've always used monopole direct-radiating subs for flanking subs and multisubs. Hornsubs are just too large and dipoles aren't in my wheelhouse. But I would think dipoles might just work very well for various flavors of multisub setups, ...
4 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...
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: Sat, 15 February 2020 07:04 «» By: Barryso
Re: Low Pass
Changed the setup again. Pulled the 4 pi's away from the wall and changed the sub crossover from 60 hz to 100 hz. This is Wayne's standard 3 and 4 pi flanking sub setup except my 4's are still on the floor. Everything is more better. Better bass, t...
7 Forum: Pi Speakers «» Posted on: Tue, 14 January 2020 18:39 «» By: Wayne Parham
Re: Flanking subs
All three subs are multisubs. The two nearest the mains are flanking subs and the distant one is a distributed multisub. Check that your plate amp DSP can support 100Hz second-order and 50Hz fourth-order Butterworth slopes. I'm sure it does, but che...
8 Forum: Pi Speakers «» Posted on: Tue, 14 January 2020 17:40 «» By: Wayne Parham
Re: Flanking subs
Your flanking subs should work well there. I visualize the mains on stands, toed-in 45°. The flanking subs are just outside, on the floor. Each of the mains and its flanking sub are pushed out nearly to the side wall. This is a good setup. Then put ...
9 Forum: Pi Speakers «» Posted on: Mon, 09 December 2019 10:47 «» By: Wayne Parham
Re: 4PI Plans Request
You've got mail! I agree with Barry about the JBL 2226H. It is an excellent midwoofer. The flux stabilization ring in the motor structure reduces distortion down to the levels normally only seen in horns. When combined with a horn tweeter, you have...
10 Forum: LSAF «» Posted on: Sun, 17 November 2019 16:02 «» By: Wayne Parham
Re: LSAF 2020
This year I'm bringing an all-Italian version of the three π loudspeakers, of course with flanking subs. I may bring distributed subs too, if space permits, for a full multisub configuration. three π loudspeakers with flanking subs What's new ...
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