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-   -   Is Eminence beta 15 good 4 dipole sub(need quick response) (http://www.diyaudio.com/forums/subwoofers/89144-eminence-beta-15-good-4-dipole-sub-need-quick-response.html)

fergs1 27th October 2006 04:32 PM

Is Eminence beta 15 good 4 dipole sub(need quick response)
 
greetings peoples, local ebay auction will end in a bit over a day for 4 pairs of Eminence BETA 15 woofers . Nominal Impedance 8 ohms Power Rating 350W rms each Resonance 35Hz Voice Coil Diameter 2" Linear X-max 4mm Total mechanical displacement P-P 23mm (Qes) 0.63 (Qms) 8.10 (Qts) 0.58 (Vas) 334L
Are these suitable for diploe and has anyone had experiense with them.urgent advice needed thanks in advance fergs

Kensai 27th October 2006 04:54 PM

Sure, they'd be fine for dipole sub, though they're likely to start their gentle roll off up around 70 if just slapped onto a board. Of course, you're talking about buying 8 of them. With a little EQ, you'll have the head room to easily make them flat down to 30Hz, I'd say (in stereo no less). Build them into ripoles and you could get flat to 50Hz with no EQ.

Good luck.

Kensai

Paul W 27th October 2006 05:26 PM

Subwoofer = HT? 4mm linear X-max is very low for a dipole in the lowest octave. Even in ripoles 8 of them would occupy unnecessary space. Unless the price and output requirements are low (music only?) there are better drivers for the application.

Calvin 28th October 2006 09:05 AM

Hi,

on first glance the Beta15A looks ok, since itīll probabely wonīt need any lowfreq-equing in many rooms, but itīll show excursion probs with very low freqs, especially when mounted in a W-style cabinet that lowers its fs further. Expect excursion limitations already just above 5V signal level with lowest freqs!

jauu
Calvin

fergs1 28th October 2006 09:38 AM

thanks for your quick replies gentlemen, I think I''ll leave that one for another time. I love this forum and the readiness and generosity with which people show each other with respect to time and knowledge, helping each other to strive for very satisfying systems without neccesarily pandering to common,mainstream concepts that rely more on financial reasons to justify their existance. cheers fergs


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