FS: 18Sound XT1086 waveguides & BMS 4538 compression tweeters - diyAudio
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Old 10th April 2009, 02:50 PM   #1
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Join Date: Sep 2002
Location: Oregon, USA
Default FS: 18Sound XT1086 waveguides & BMS 4538 compression tweeters

Pair 18Sound XT1086 waveguides - $100 shipped to the lower 48 states
Pair BMS 4538 compression tweeters - $60 shipped to the lower 48

$150 shipped if you want them all

I bought the waveguides new, and they're in excellent condition (about a year old). I got the tweeters used, and they're a little scuffed on the back.

XT1086 specs

BMS 4538 specs

They sound great. The only reason I'm selling them is difficulty in designing the crossover - these are significantly deeper than my 6.5" midrange driver, and I'm having a hard time making the phase line up. If you plan to use them with a larger / deeper mid/woofer, or your crossover design skills are better than mine (which wouldn't take much), I definitely recommend these.

My measurements - ignore the absolute levels, these aren't calibrated, and the ripples are most likely due to my makeshift measurement setup. This is with the WG surface-mounted to an 11" wide baffle. The upper set of curves is the tweeter, and they cover roughly 0 - 60 degrees:

Click the image to open in full size.

Pictures on the baffle:

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Click the image to open in full size.
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Old 10th April 2009, 11:13 PM   #2
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Join Date: Nov 2005
Location: East Lansing, MI
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Old 10th April 2009, 11:43 PM   #3
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Join Date: Sep 2002
Location: Oregon, USA
These have been sold.
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