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40 Search Results Found |
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Forum: Speaker «»
Posted on: Fri, 12 April 2024 14:13 «»
By: Barryso
SBIR
… happens.
But my 4 pi's aren't flat against the wall. They are angled so the tweeters cross a few feet in front of the sweet spot. So the front corners of the speakers are 14" and 24" from the wall. What happens with SBIR in this situation…
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Forum: Pi Speakers «»
Posted on: Mon, 22 August 2022 17:01 «»
By: Wayne Parham
Re: My 3π adventure
…speaker boundary interference response (SBIR) anomalies, which are what usually causes the roller-coaster in that region. And they also provide baffle-step compensation, which is what makes the speakers droop below 200Hz or so.
The SBIR anomaly is …
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Forum: Speaker «»
Posted on: Sun, 20 December 2020 12:36 «»
By: Wayne Parham
Re: Futzing with vibration control
…in the room. There is no need for SBIR mitigation from flanking 'cause there is no SBIR.
But when the mains are spaced a few feet from the wall, the flanking subs definitely help the massive SBIR that results. They can fill in that 15dB low-midrange …
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Forum: Speaker «»
Posted on: Tue, 08 September 2020 13:02 «»
By: Wayne Parham
Re: Radian 475PB
…speaker like the JBL 4435.
2. Mitigate SBIR and higher-frequency room modes. At the same time the helper woofer is augmenting the lower midrange and upper midbass, it can be used to reduce the self-interference notches from nearby reflections. To …
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Forum: Speaker «»
Posted on: Thu, 25 April 2024 14:52 «»
By: Barryso
Re: SBIR
… figure out doesn't have anything to do with SBIR.
I recently re-read your FAQ on wavefront launch and moved the speakers closer to the wall. Discovered they had less bass when their backs were up against the wall then when toed in to cross in front …
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Forum: Speaker «»
Posted on: Sat, 13 April 2024 09:11 «»
By: Wayne Parham
Re: SBIR
…creates a notch around 80Hz to 120Hz from SBIR, which is very common. Most people place speakers about this far from the wall behind them, so the SBIR notch in this frequency range is very common. Scan the internet for in-room response charts and you'll…
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Forum: Pi Speakers «»
Posted on: Wed, 15 March 2023 09:41 «»
By: Wayne Parham
Re: Pi3 vs Pi4
…but also baffle step compensation and SBIR mitigation. It provides much better in-room response than any full-range main speaker with built-in woofer, no matter how deep the response goes.
To be able to provide that benefit, the flanking sub must be …
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Forum: Pi Speakers «»
Posted on: Fri, 01 July 2022 16:31 «»
By: Wayne Parham
Re: Small Room Suggestions
…r-space is best. Of course, that then gives SBIR but that's what flanking subs mitigate.
Speakers pulled far away from walls always have the benefit of no SBIR, but then they often sound kind of thin. It's always a trade-off of one kind or another…
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Forum: Pi Speakers «»
Posted on: Fri, 26 February 2021 16:28 «»
By: Wayne Parham
Re: Downfiring flanking subs ??
…phase relationships from room modes and SBIR - we benefit from having some distance between the mains and the subs.
But like I said above, what we want is to "fill in the hole" from SBIR with that wall behind the mains. That happens at the …
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Forum: Pi Speakers «»
Posted on: Fri, 26 February 2021 15:41 «»
By: ooheadsoo
Re: Downfiring flanking subs ??
…of the speaker, I am still getting some SBIR in the upper bass. Besides SBIR, another reason I need the speakers as close to the wall as possible is active/curious toddlers. Since I am in need of speaker stands, I intend to buy/build subwoofers as use …
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