LT250 Horn Flare? [message #47369] |
Fri, 22 July 2005 20:07 |
GarMan
Messages: 960 Registered: May 2009
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Illuminati (2nd Degree) |
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Wayne, Can you tell me anything about the Eminence LT250 horn? I understand you've used this in the past in designs where space was tight. I've been trying to come up with a design for a center channel to match my Theatre-3's and can't find a way to do it with the H290/295. The speaker has to be under 18" and the horn over driver arrangement does not fit. I'm thinking a horizontal MTM arrangement, with a 12LF on either side of a LT250. Do you think the 60 degree horizontal dispersion is too narrow? Will sensitivity for the PSD2002 increase with this horn vs. the H295 due to the more confined dispersion? thanks, Gar.
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Horizontal Symmetry [message #47395 is a reply to message #47370] |
Mon, 25 July 2005 14:31 |
GarMan
Messages: 960 Registered: May 2009
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Illuminati (2nd Degree) |
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Wayne, another option I have to keep the speaker small is to do away with the second woofer and just have woofer and horn side-by-side on the baffle. However, almost all center channel speakers I've seen have symmetry along the horizontal (or symmetry reflected on the vertical, but you know what I mean). Is this MTM symmetrical arrangment an absolute neccessity for horizontally placed speakers, or is it a way for manufacturers to justify a higher price due to the second woofer? Gar.
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SST1 [message #47402 is a reply to message #47397] |
Tue, 26 July 2005 09:26 |
GarMan
Messages: 960 Registered: May 2009
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Illuminati (2nd Degree) |
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Did some reading last night and found the rule of thumb of keeping drivers under one wavelength apart of the crossover frequency. Crossing over at 1600Hz means I need to keep the drivers under 8" apart. I also found that a horizontal placement of woofer and tweeter may not be a bad as I originally thought. I was surprised to see in Loudspeaker Cookbook that a W/T placement performs better horizontally off axis than a W-T-W placement. It seems that the extra woofer in the W-T-W creates even deeper nulls at the crossover region off axis than a simple W-T. My new question is, what's the difference between Eminence H295 and the SST1. According to spec, they both have the same cutoff and dispersion pattern. Yet, they're different in shape. I used the H295 in my Theatre-3's and would like to keep a CD horn for centre channel. The SST1 is several inches more narrow than the H295 and would allow to to place the two drivers closer. thanks, Gar.
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