Combo! Sealed Sub below Mains - Page 5 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #41 of 70 Old 11-03-09, 12:47 AM
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Re: Combo! Sealed Sub below Mains

If you could swing 500-700 you could build a pair of these. I bet they rock the house pretty good.

Total woofage four 8" woofers and two 6" mids. Should offer plenty of output. High quality design too.

http://www.htguide.com/forum/showthread.php4?t=15323

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post #42 of 70 Old 11-03-09, 12:56 AM Thread Starter
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Re: Combo! Sealed Sub below Mains

That looks NICE-I'll take a further look. Not sure my craftmanship will even come close-I'll have to go gloss black or veneer if I build.
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post #43 of 70 Old 11-03-09, 12:03 PM
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Re: Combo! Sealed Sub below Mains

Actually the pictured speaker IS veneered I belive, with a gloss black back and top. If you check out the build thread you'll see more pictures.
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post #44 of 70 Old 11-03-09, 01:29 PM Thread Starter
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Re: Combo! Sealed Sub below Mains

I don't know which thread it is- it looked like the thread had dozens of pages
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post #45 of 70 Old 01-05-10, 12:18 PM Thread Starter
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Re: Combo! Sealed Sub below Mains

I'm back! And still undecided

I have my set of 5" TM bookshelves for full surround (currently on the floor), a collection of amps/crossovers (please don't ask), and now NEED to decide on my bass bins-and could use your help! I want to obtain the best sound while utilizing the stands as bass bins. Keeping in mind that I have a Mal-X, but would like to be able to listen to music without needing it. My options are:

1) to build slim bass bins using 6.5" dual anarchy drivers, 30hz tune/25hz hpf for the front three (using active crossover and pro-amp power for top/bottom). Allows possibility to crossover bass bin to bookshelves at higher freq.

2) to build wider bass bins using lone/dual 8" or 10" drivers, sealed for the front three (using preamp's sub-out at 80hz.

3) to build down-firing sonosub bass bins using lone 8, 10, or even 12" drivers, sealed for the front three (again, using preamp's sub out at 80hz) These might be too big. The 12" is the only driver incapable of higher freqs.

I am using a makeshift computer, and consequently am having trouble modeling these drivers. The drivers under consideration are:

6.5" Exodus Anarchy $52ea Mms 26g Cms .49 Re 6.2 Sd 131 BL 9.76 Qms 6.7 Pe 100w Xmax 14mm

8" Peerless $32ea Le: 0.97 mH *Re: 3.4 ohms *Fs: 45 Hz *SPL: 85 dB 1W/1m *Vas: 0.72 cu. ft. *Qms: 6.19 *Qes: 0.96 *Qts: 0.83 *Xmax: 8 mm Pe 125w (This one has Miller & Kreisel on the oversized dustcap)

10" Peerless $35ea Le: 2.1 mH *Re: 6.7 ohms *Fs: 36 Hz *SPL: 89.5 dB 1W/1m *Vas: 2.58 cu. ft. *Qms: 2.80 *Qes: 0.65 *Qts: 0.53 *Xmax: 8.5 Pe 110w

12" Elemental Designs Qts: .31 Qes: .35 Qms: 3.33 Fs: 21.5Hz Re: 3.7 Vas: 162L Mms: 142.0g Bl: 15.00T*m SPL: 88.47dB Sd: 545cm² Xmax: 16.0mm

The Peerless drivers are listed by parts express as ideal for equalized, sealed designs, but I'm not sure why my model doesn't show cone excursion for these Peerless drivers.

The Exodus driver concerns me a bit, because it would be an expensive, or impossible, replacement in the future.

Budget basically allows for pairs of any driver to be used per bass bin.


Last edited by ironglen; 01-05-10 at 05:37 PM. Reason: addl info
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post #46 of 70 Old 01-06-10, 01:59 AM Thread Starter
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Re: Combo! Sealed Sub below Mains

Ok, used work computer after hrs But my sealed modeling for both peerless is not showing cone excursion I know the parts express specs are lacking several parameters, so maybe that's the cause. I've also got .9 something values for my qtc values for these sealed units Then, when I change volumes, little change in response.

When parts express states that a driver is 'perfect for equalized sealed box designs', I figured enclosure size for an 8" or 10" would be 1-3 ft³ Am I

Any ideas?
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post #47 of 70 Old 01-06-10, 03:32 AM
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Re: Combo! Sealed Sub below Mains

Quote:
But my sealed modeling for both peerless is not showing cone excursion
You need the Sd parameter for cone excursion to work.




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post #48 of 70 Old 01-06-10, 11:20 AM Thread Starter
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Re: Combo! Sealed Sub below Mains

Thanks Mike-PE is checking on that for me. Many drivers show freq response good to 2khz, but I'm skeptical. If I stretch my winisd freq response graph, it won't show breakups from a cone will it? I know these drivers for sub use won't play well up higher, but I'm not sure how high they'll go. I'd like my bass bins to be able to play up to 300-400 hz cleanly, however, I don't want my low end to necessitate an additional sub...
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post #49 of 70 Old 01-06-10, 03:50 PM
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Re: Combo! Sealed Sub below Mains

Quote:
ironglen wrote: View Post
Thanks Mike-PE is checking on that for me. Many drivers show freq response good to 2khz, but I'm skeptical. If I stretch my winisd freq response graph, it won't show breakups from a cone will it? I know these drivers for sub use won't play well up higher, but I'm not sure how high they'll go. I'd like my bass bins to be able to play up to 300-400 hz cleanly, however, I don't want my low end to necessitate an additional sub...
Finding a sub that plays up to 300-400hz is nearly impossible. I've never seen that driver, but ported the anarchy gets down to 50hz just fine. It can easily get up to 300-400hz.

The highest sub crossover I know off is the TC sounds 8" driver (soundsplinter) up to 200hz according to one of my speaker buddies who measured it's performance.
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post #50 of 70 Old 01-06-10, 06:47 PM Thread Starter
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Re: Combo! Sealed Sub below Mains

Quote:
lsiberian wrote: View Post
Finding a sub that plays up to 300-400hz is nearly impossible. I've never seen that driver, but ported the anarchy gets down to 50hz just fine. It can easily get up to 300-400hz.

The highest sub crossover I know off is the TC sounds 8" driver (soundsplinter) up to 200hz according to one of my speaker buddies who measured it's performance.
True, but what about quality 8" or even 10" bass drivers that could be used in a pair for greater power handling, rather than dedicated sub drivers? Many popular brands (Emotiva 8.3) and diy (Natalie P) use dual 8's and go pretty low, plus I don't need it to play as high since I have a mid.
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