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130 Search Results Found |
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Forum: Speaker «»
Posted on: Mon, 26 July 2004 11:10 «»
By: Wayne Parham
Re: choices, choices
You're right, there are lots of choices to consider.Here are some general rules:Long horns with narrow and gradually opening flares tend to improve low-end response.Shorter horns with more rapidly opening flares tend to work better at higher frequencies.B...
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Forum: Pi Speakers «»
Posted on: Mon, 12 April 2004 01:03 «»
By: Wayne Parham
Implementation
Implementation
The simplest implementation of the horn is as a full vocal range driver. When used in this way, it will provide output from 250Hz to 3.5kHz in free space, or 150Hz to 3.5kHz quarter-space or eighth-space, such as when used indoors. For ...
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Forum: Pi Speakers «»
Posted on: Mon, 26 January 2004 20:19 «»
By: Wayne Parham
Re: Constrained spatial loading
If a room's ceiling is eight feet high, then the expansion from the apex of the corner at the floor-wall-wall junction is purely conical for eight feet. At that point, another boundary is encountered - The ceiling makes the expansion become more like a p...
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Forum: Pi Speakers «»
Posted on: Wed, 14 May 2003 03:36 «»
By: Wayne Parham
Re: Cornerhorns, revisited
Certainly the configuration of the home and its type and quality of construction are important factors. But no matter what kind of speakers you have, if the acoustics are bad, then you have a problem. I suppose some argument can be made that a highly dir...
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Forum: Pi Speakers «»
Posted on: Tue, 13 May 2003 23:56 «»
By: Wayne Parham
Baffle spacing, phase angles and time alignment, revisited
In this post, I'd like to revisit the issues of baffle spacing, phase angles and time alignment. It's been a while since we talked about this, and I think it would be good to come at it from a different angle.
Bad pun. Sorry.
There's no way to ma...
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Forum: Pi Speakers «»
Posted on: Sat, 23 November 2002 11:58 «»
By: Wayne Parham
Edgar vs. Martinelli
Both Edgar and Martinelli make excellent horns but I prefer using 90o horns for the home, particularly for cornerhorns. That makes the pattern equal for the entire audio band and charges the reverberent field equally. Narrower horns increase SPL on axis,...
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Forum: Pi Speakers «»
Posted on: Wed, 25 September 2002 21:23 «»
By: Wayne Parham
Re: Predicting room boundary reinforcement
Basically, a room boundary sets radiating angle if it is within a 1/4 wavelength. If a room boundary is further than that, it acts as a reflector instead. The goal is to take advantage of these boundary conditions, and to avoid situations that will cause...
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Forum: Pi Speakers «»
Posted on: Wed, 11 September 2002 15:30 «»
By: Wayne Parham
Re: Low frequency in room cancellations
If the room is large enough that the room modes all fall below the passband, then the sound acts as a reverberent field. In that case, you would want to setup speakers for constructive reinforcement, where possible. You might want to have banks of louds...
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Forum: Pi Speakers «»
Posted on: Mon, 26 August 2002 00:13 «»
By: Wayne Parham
Cornerhorn angles, dispersion and stuff
There is no reason you can't rotate the horns from their natural 45° orientation. It is sometimes the best thing to do in rooms that are very long and narrow. But one of the main features of the π cornerhorn is matched angular coverage of each subsyst...
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Forum: Pi Speakers «»
Posted on: Thu, 22 August 2002 02:53 «»
By: Wayne Parham
Re: Effects of horn loading
When a horn is placed in constrained space, it acts similarly to a ground plane would for an antenna. It's like a mirror were presented to the mouth of the horn, and it acts as though it had a larger mouth.This is true for room boundaries and for baffle m...
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