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Old 15th July 2004, 01:10 AM   #1
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Default small HT subwoofer ideas?

Ok, the tang band 6.5 is a dud. What I want to build is the smallest HT type sub possible. 6th order bandpass seems the most effcient but most difficult to design. Not looking for quality here just boom, in a normal size room. What other driver/alingments would fit the bill? BTW, the cheaper the better. LOL!
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Old 15th July 2004, 02:40 AM   #2
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Check the past few issues of AudioXpress magazine for articles on small VBs using Tang Band and MCM 8s. In the same magazine I have an upcoming small (3.4 cu ft) folded horn sub using the MCM 8; average SPL over 100dB/1 watt corner loaded.
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Old 15th July 2004, 02:55 AM   #3
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Default Re: small HT subwoofer ideas?

Quote:
Originally posted by mightyjimbo
What I want to build is the smallest HT type sub possible.

Quote:
Originally posted by BillFitzmaurice
I have an upcoming small (3.4 cu ft)

I don't think 3.4CuFt is small by his definition!!!!

2 dayton series I 8" in an isobaric configuration in a 12x12x12 vented box tuned to 30Hz would work out nicely. Models down to about 30Hz nicely....no crazy "humps". A plate amp would fit nicely on the back of those dimensions.

6th order bandpass just doesn't seem appealing to me. Its to "all over the place" for me
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Old 15th July 2004, 03:15 AM   #4
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Default Re: Re: small HT subwoofer ideas?

Quote:
Originally posted by Hybrid fourdoor






I don't think 3.4CuFt is small by his definition!!!!

2 dayton series I 8" in an isobaric configuration in a 12x12x12 vented box tuned to 30Hz would work out nicely. Models down to about 30Hz nicely....no crazy "humps". A plate amp would fit nicely on the back of those dimensions.

6th order bandpass just doesn't seem appealing to me. Its to "all over the place" for me

I've used the Daytons and found they had problems with long excursions; the Tang Band and MCM have twice the excursion of the Daytons. The boxes for their designs run about 1.5 cu ft, good to 30 Hz, and you only need to pay for one driver.

My 3.4 cu ft (18 inches cubed, actually) horn isn't pint sized, but it's no larger than the average sub that runs at least 10dB less sensitive.
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Old 15th July 2004, 03:52 AM   #5
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Ditto on the 8" Tangband. I built one and sold it to a friend who is very happy. Of course, I auditioned it for a while first
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Old 15th July 2004, 05:37 PM   #6
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Hey Tim,

Do you have any details about the TB W8-740C sub that you built? Ported? Dimensions?

If you just used RAW's enclosure, then I already know the approximate details... I'm just looking for other ideas as well.

I am planning on using his vented suggestion so far, since the performance it had in a sealed box I built earlier was less than stellar.

Cheers,
Chris
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Old 15th July 2004, 07:12 PM   #7
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Default Re: small HT subwoofer ideas?

Quote:
Originally posted by mightyjimbo
What other driver/alingments would fit the bill? BTW, the cheaper the better. LOL!
If you want cheap, this is perfectly suitable:

http://www.diyaudio.com/forums/showt...873#post371873

If you are thinking higher end, this is a very elegant design in a small footprint:

http://www.diyaudio.com/forums/showt...428#post222428
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Old 15th July 2004, 08:35 PM   #8
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Quote:
Originally posted by BillFitzmaurice
Check the past few issues of AudioXpress magazine for articles on small VBs using Tang Band and MCM 8s. In the same magazine I have an upcoming small (3.4 cu ft) folded horn sub using the MCM 8; average SPL over 100dB/1 watt corner loaded.
Anyway I can weasel you into e-mailing me your article??


Mightyjimbo - CSS has their compact downfiring sub cabinets on sale for $99. Piano black, very nice.
http://www.creativesound.ca/specials.html
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Old 15th July 2004, 09:44 PM   #9
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[QUOTE]Originally posted by Lusso5
[B]

Anyway I can weasel you into e-mailing me your article??


Sorry- that would violate my publishing contract. My published designs will be available at www.billfitzmaurice.com soon.
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Old 15th July 2004, 09:47 PM   #10
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Quote:
Originally posted by CrisTUFR
Hey Tim,

Do you have any details about the TB W8-740C sub that you built? Ported? Dimensions?

If you just used RAW's enclosure, then I already know the approximate details... I'm just looking for other ideas as well.

I am planning on using his vented suggestion so far, since the performance it had in a sealed box I built earlier was less than stellar.

Cheers,
Chris
The one I built was for a car so it wasn't tuned as low as you'd probably like and had a box shape better suited for a car. I think the designs that have been showing up lately in AudioXpress are the ones to go with. I like the ways that were contrived to get long ports in small boxes. One idea was to use PVC piping with elbows, another used long rectangular ductwork built on to the end of the box. The port length totaled 32". The length is good but I think round pipe would be better.
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