thoughts on this sub

1184 Views 6 Replies 3 Participants Last post by Mike P., Nov 23, 2009

stanford1621

Discussion Starter · Nov 23, 2009

I have 4 "resonant engineering" sx 15's there specs are

Electrical Q Value -Qes: 0.38
Mechanical Q Value -Qms: 4.7
Total Speaker Q Value -Qts: 0.38
Free Air Resonance -Fs: 27.8 Hz
Equivalent Compliance -Vas: 126.3 liters
One-Way, Linear Excursion -Xmax: 22 mm
Efficiency -SPL 1W/1m: 90.4 dB SPL
Effective Piston Area -Sd: 810 cm^2
DC Resistance -Re: 1.9 ohm
Nominal Impedance -Znom: Dual 2 ohm
Thermal Power Handling -Pe: 1000 W
Force Factor -Bl: 21

Are these worth using for my HT build? I would prefer to build a large ported box but am open to suggestions anybody have any? My living room / kitchen (open floor plan) is about 39 ft x 19ft with 10 foot ceilings. For power I am thinking of 2 behringer 2500's.

Thanks

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Mike P.

· #2 · Nov 23, 2009

Are the subs DVC 2 ohm?

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stanford1621

Discussion Starter · #3 · Nov 23, 2009

yes there dual 2 ohm

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Mike P.

· #4 · Nov 23, 2009

If the parameters are accurate then they do quite well. Shown is 2 of the subs in 12 cu.ft tuned to 20 hz fed by an EP2500 with a hi pass filter at 18 hz. A 8" diameter round port 22" long would deal with the port air speed. 2 of these subs would be impressive.

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stanford1621

Discussion Starter · #5 · Nov 23, 2009

thanks mike, I have built many boxes for car audio and one thing you never see any more are round ports, in my experience I have always had less "port noise" with slot ports in my builds, is there a reason HT guys still use round ports? Just for the ease of build factor?

These subs have always impressed me I had 4 of them in a 20cf ported box tuned to 30hz in an extended cab truck with 1000 RMS going to each. Thanks again.

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Ryan Anderson

· #6 · Nov 23, 2009

stanford1621 said:
These subs have always impressed me I had 4 of them in a 20cf ported box tuned to 30hz in an extended cab truck with 1000 RMS going to each. Thanks again.

20 cubes for 4 15's, that impresses me!

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Mike P.

· #7 · Nov 23, 2009

A lot of people use sonotube for large round ports as it's cheap. Slots work just as well.

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