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  #1  
Old 06-27-2012, 04:42 PM
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Default Home Audio box question

i just bought two 8 in subs and i am going to do a fourth order bandpass box and i was wondering what ratio to use and how big the sealed side should be. i know this isnt a home audio forum but all opinions are good.

here are the specs on the subs:
Power handling: 65 watts RMS/90 watts max VCdia: 1-1/2" Le: 1.07 mH Impedance: 8 ohms Re: 7.58 ohms Frequency range: 40-5,000 Hz Fs: 52 Hz SPL: 85 dB 1W/1m Vas: 0.76 cu. ft. Qms: 4.77 Qes: 1.45 Qts: 1.11 Xmax: 3 mm Dimensions: Overall diameter: 8", Cutout diameter: 7-5/16", Depth: 3-7/16".
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Old 06-27-2012, 04:44 PM
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Might want to do a quasi-6th....depending on the sub specs..possibly Hackmunch or someone who knows them well will post a reply....
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Old 06-27-2012, 04:48 PM
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Originally Posted by Micksh View Post
Might want to do a quasi-6th....depending on the sub specs..possibly Hackmunch or someone who knows them well will post a reply....
i would but the website says the subs perform optimally in sealed designs...
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Old 06-27-2012, 08:17 PM
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Nobody has an opinion? I find that hard to believe...
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Old 06-27-2012, 08:36 PM
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Qts is super high, from ts parameters I would go 2cft shared, 3:1 minimium ported to about 50hz
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Old 06-27-2012, 11:01 PM
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Originally Posted by HACKMUNCH View Post
Qts is super high, from ts parameters I would go 2cft shared, 3:1 minimium ported to about 50hz
Why port so high?
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Old 06-28-2012, 03:46 AM
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Originally Posted by IowaBass View Post
Why port so high?
Because that's how 4th orders work. I second HACKs recommendation, although unless you really just want a large box you'll probably like those better in a simple sealed box corner loaded in your room.
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Old 06-28-2012, 09:18 AM
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Originally Posted by SPLEclipse View Post
Because that's how 4th orders work. I second HACKs recommendation, although unless you really just want a large box you'll probably like those better in a simple sealed box corner loaded in your room.
I just assumed fouth orders are best for home audio since most home subs I see are fouth but I guess I could do a down firing sealed.
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Old 06-28-2012, 11:52 AM
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Originally Posted by IowaBass View Post
I just assumed fouth orders are best for home audio since most home subs I see are fouth but I guess I could do a down firing sealed.
Are you thinking of a regular ported box? I've also heard of that referred to as being a 4th order enclosure, but we are talking about a bandpass design. If you are talking about a vented enclosure, I would advise against it with those specs. Stick with a moderate sized sealed enclosure.
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Old 06-28-2012, 12:23 PM
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Originally Posted by SPLEclipse View Post
Are you thinking of a regular ported box? I've also heard of that referred to as being a 4th order enclosure, but we are talking about a bandpass design. If you are talking about a vented enclosure, I would advise against it with those specs. Stick with a moderate sized sealed enclosure.
i know the difference between bandpass and ported. most home subs ive seen were fourth or possibly sixth. either way you couldnt see the sub there was only a port ya catch ma drift?
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