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1 Forum: Speaker «» Posted on: Mon, 03 September 2018 20:04 «» By: Wayne Parham
Re: Horn mouth vs. front baffle or "speaker cone"
Here's a post that contains a video that shows measurement of vertical nulls: Crossover optimization for DI-matched two-way speakersThe thread above shows my design process for crossover optimization of matched-directivity two-way speakers like the thre...
2 Forum: Room Acoustics «» Posted on: Tue, 17 July 2018 15:17 «» By: Wayne Parham
Re: Small-room acoustics
The problem in small rooms isn't sound pressure level, because that's easy enough to fix simply by turning the volume down. The problem is room modes; Regions that have no bass at some frequencies adjacent to regions with too much bass at some freque...
3 Forum: Speaker «» Posted on: Sun, 08 July 2018 11:57 «» By: Wayne Parham
Re: Subwoofer Setup
That's great to hear, Barry. Thanks for the feedback! As you and I have discussed, I'm a big proponent of multisubs but I consider the flanking sub aspect to be an additional requirement. I think that distributed multisubs by themselves only solve p...
4 Forum: Speaker «» Posted on: Sun, 08 July 2018 08:34 «» By: Barryso
Subwoofer Setup
My high school photography instructor was the one that got me into audio. Don't know if he did me a great favor or not but ... His audio room is particularly boomy. He's been running his system with several subs for a few years ever since he heard wha...
5 Forum: Pi Speakers «» Posted on: Sun, 13 May 2018 12:17 «» By: Wayne Parham
Re: 3Pi Sub plans, and some other questions.
You've got mail! Vented and sealed subs are generally pretty tolerant of modifications. They are acoustically small, so standing waves don't setup inside. So basically, as long as the internal volume and port remain the same, you can expect performa...
6 Forum: LSAF «» Posted on: Thu, 10 May 2018 09:07 «» By: Wayne Parham
Re: LSAF 2018
My room sounded great, especially for a hotel room. To be honest, I've done this show for nearly 20 years now, so I have it down. I know exactly where to put my speakers and how to setup the equipment. I always bring either seven π constant dire...
7 Forum: Home Theater «» Posted on: Mon, 26 March 2018 09:20 «» By: Wayne Parham
Re: Custom home theater room
I've had the most consistently good results from rooms on concrete slabs with framed drywall construction. Drywall is pretty lossy and acts like panel absorbers. Rooms on hardwood floors over crawlspaces are often problematic though. Second floor room...
8 Forum: Room Acoustics «» Posted on: Mon, 19 March 2018 09:29 «» By: Wayne Parham
Re: Concrete Vs other types of wall
Concrete surfaces on all six sides (4 walls, floor and ceiling) are problematic because there is so little damping. Reflections are strong and room modes are terrible. Even if you tame the high-frequency reflections with absorbent materials, room mode...
9 Forum: Room Acoustics «» Posted on: Sat, 17 March 2018 22:36 «» By: Leot55
Re: Concrete Vs other types of wall
Is that meant to contain echoes, to keep the sound from getting distorted, or to keep the sound from leaking upstairs? Do you think it's worse when the flooring is concrete too? I have a system in the basement and it's hard to hear it. But then again,...
10 Forum: Speaker «» Posted on: Thu, 01 March 2018 09:12 «» By: Wayne Parham
Re: Dead Spots
Yes, that is typical and it is the result of room modes. Read about multisubs and flanking subs. That's the way to get smooth bass which is uniform in all locations in the room. In the meantime, you may be able to mitigate the straight-on dead-spo...
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