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post #151 of 155 Old 04-16-2012, 11:50 AM
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Bill Fitzmaurice-

what would be your highest recommended crossover for a THT? Assuming a full width (36") build. I've seen this question asked a couple of time, but I've never seen an exact answer. My mains use 12" eminence drivers and do fine down to about 40Hz. I'm curious about running the THT up higher though to deal with room modes. If I ran them higher I would certainly move my mains to sealed instead of ported enclosures to help with integration (the mains would then be -6db ~80Hz ).... The THT would be running in stereo next to the mains.

hope I'm not thread hijacking

thanks
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post #152 of 155 Old 04-16-2012, 03:09 PM
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Originally Posted by josephjcole View Post

Bill Fitzmaurice-

what would be your highest recommended crossover for a THT?

I wouldn't take them higher than 100Hz, if you do localization issues would arise. The same pretty much applies to all subs.

Bill Fitzmaurice Loudspeaker Design

The Laws of Physics aren't swayed by opinion.
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post #153 of 155 Old 04-16-2012, 04:23 PM
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What about if you are running the THT in stereo next to the mains? In a configuration similar to what Wayne Parham recommends with his "flanking subs" in which he recommends running subs next to the mains up to 150-200Hz. So localization issues aside, do you have any thoughts around what frequency SQ would start to degrade when crossing over to a pair of THT, assuming everything is well set up and measured and DSP is available?

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post #154 of 155 Old 04-16-2012, 04:53 PM
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Quote:
Originally Posted by josephjcole View Post

What about if you are running the THT in stereo next to the mains?

That's fine if you don't have room mode issues with that placement.
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So localization issues aside, do you have any thoughts around what frequency SQ would start to degrade when crossing over to a pair of THT,

I have no idea, I've never run them higher than 80Hz myself.

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post #155 of 155 Old 08-11-2012, 03:04 PM
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I finally got around to making the mesh cover for my THT. I made a frame using the plywood scraps that fit the inside of the opening very snug and I just used mesh from the fabric store and used my staple gun to tack the corners together and the mesh into place. The mesh went on pretty easily, it got tacked on to the inside of the frame and I did one side, then the adjacent side. This was I was able to pull the mesh taught in the corners. Then I just pulled the mesh tight for the other two sides while stapling them down. You can use glue, too, but if you opt to just use staples it just takes more since you don't have glue to help keep the fabric in place.

IMAG0969.jpg
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