Dual driver sealed box question - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 17 Old 02-19-10, 12:15 PM
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Re: Dual driver sealed box question

Sure. With two of those woofers in a 2.6 cuft sealed alignment you end up with an fb of about 48Hz, which is pretty typical for car audio but pretty high for home audio. This is what I mean by challenging, as with a high resonance it will likely sound boomy in your room and seem to lack really deep low bass output. But, if you must use them go for it, you might like them. Since you already own the drivers the only thing you have to lose is your time and a few bucks for the MDF.
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post #12 of 17 Old 02-19-10, 12:30 PM Thread Starter
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Re: Dual driver sealed box question

Well it sounds like I should go ported then as I think form what other have said I can get to 25hz to 22hz with them ported.
Thank you for all your input my friend.
What do you think about the ported option?

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post #13 of 17 Old 02-19-10, 12:48 PM
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Re: Dual driver sealed box question

Sure, in 2.6 cuft you can port it at 24Hz and get a relatively flat output curve. With your amp you can exceed Xmax at around 20Hz so a good steep subsonic filter will be needed.
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post #14 of 17 Old 02-19-10, 01:25 PM
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Re: Dual driver sealed box question

There would be more low end output to be had in a larger box tuned lower.

Dual driver sealed box question-box.jpg




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post #15 of 17 Old 02-19-10, 02:32 PM Thread Starter
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Re: Dual driver sealed box question

Would it be better on the drivers to tune to 21hz or 24hz since x-max is reached at 20hz. I would not likely run the amp at full power either. I went the 700 watt model instead of the 425 watt for headroom.
I see your point about not being able to over drive the driver though.
I am using the Behringer DCX2496 crossover so I can tailor the high pass (isnt the high pass a subsonic filter?) however I want I believe.
"You also get four different mono and stereo output operating modes, all with individual crossover filter types (Butterworth, Bessel and Linkwitz-Riley) with selectable roll-off characteristics from 6 to 48 dB/octave. The delays for all inputs and outputs are adjustable. This allows you to manually or automatically correct for room temperature, phase and arrival time differences."

Which crossover type and what is faster 6db or 48db I would assume 6db slope (if slope is the correct term.. hehe)
Is x-max limit lower in a bigger box?

Thanks again for all the help!!

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post #16 of 17 Old 02-19-10, 02:38 PM Thread Starter
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Re: Dual driver sealed box question

Does that software also say which port size and length I should run?
I was thinking 2 4in tubes flared to keep port velocity down to avoid port noise/chuffing.
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post #17 of 17 Old 02-19-10, 02:49 PM
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Re: Dual driver sealed box question

You may as well continue with ported questions in your other thread.

http://www.hometheatershack.com/foru...lp-please.html




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