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Old 10th November 2006, 03:51 PM   #1
thadman is offline thadman  United States
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Default Open-Baffle dipoles...a heresy to pair PA drivers w/ home drivers?

I am acquiring a pair of Seas W18Es in a trade, already have a pair of Usher 9845s and BG Neo3s and have been contemplating building a pair of open-baffle towers for a while and was just recommended to look at the Eminence Alpha 15As for lower midbass and lower/mid midrange duty.

How do PA speakers like this measure up to the Dayton Reference 8s/10s in terms of dynamics, distortion, and transient response?

1, maybe 2 per side crossed at 60/80hz up to 300/600hz on a 24" baffle. (They are going to be crossed over from an Ava 18" in an LLT sonotube on the low-end and crossed over to a pair of Seas W18Es on the high end)

Can PA speakers compete with the best home has to offer? Would it be better to go with a different midrange than the Seas W18E, in favor of another PA driver?

I'm looking for the utmost fidelity, not necessarily all-out SPL (after all this is a dipole project and im not a DJ)
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Old 10th November 2006, 04:01 PM   #2
thadman is offline thadman  United States
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Im open to other options besides the Alpha 15
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Old 11th November 2006, 03:03 PM   #3
thadman is offline thadman  United States
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Old 11th November 2006, 04:04 PM   #4
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Beta 15 is better than Alpha for OB use. Works very well indeed.
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Old 11th November 2006, 04:05 PM   #5
thadman is offline thadman  United States
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What about the B&C PBZ 40 15"?

8mm xmax, Fs 39hz, Qts of .29, 97dB sensitivity, 2.4mH Le

Is the inductance too high 300/400hz use?
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Old 11th November 2006, 06:28 PM   #6
thadman is offline thadman  United States
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I guess the better question would be, what is the lowest distortion PA midbass driver <$100/driver (ebay, partsexpress, anything works as long as its new) that will mate best with a Seas W18E and Ava 18 @ 4ohms in a Sonotube LLT.
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Old 11th November 2006, 08:59 PM   #7
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Quote:
Originally posted by thadman
What about the B&C PBZ 40 15"?

8mm xmax, Fs 39hz, Qts of .29, 97dB sensitivity, 2.4mH Le

Is the inductance too high 300/400hz use?

With a Qts of 0.29, you would need to do more equilization for dipole rolloff, especially compared to the Alpha 15.
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Old 11th November 2006, 09:11 PM   #8
thadman is offline thadman  United States
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Im planning on purchasing a DEQ2496 or some sort of equalizer so I dont think that will be a problem.

Other than having to compensate with equalization, are there any other drawbacks? Would I run into thermal compression or lose efficiency by using this driver? It has over double the linear excursion of the Alpha 15 and looks to be built much better.

I've never gotten a direct answer, but are these PA drivers really low distortion? Do they compete with the levels of distortion in this passband with home drivers?
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