how small of a sealed box could i get away with ? - diyAudio
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Old 22nd August 2004, 09:43 AM   #1
zuki is offline zuki  United States
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Default how small of a sealed box could i get away with ?

here are the driver specs

thank you




Mechanical Parameters:

Fs = 20.5 hertz
Qms = 4.85
Vas = 3.56 cu.ft or 101 liters
Cms = 0.057 in/Ib
Mms = 5.964 oz or 169.1 grams
Rms = 9.843 Ibs/sec
Xmax = 16 mm
Sd = 72.5 sq.in or Dia = 9.6 in or 244 mm
Electrical Parameters:

Qes = 0.440
Re = 6.7 ohms
Le = 5.16 mH
Z = 8.0 ohms
BL = 18.5
Pe = 200.0 watts

Combination Parameters:

Qts = 0.40
Sens = 87.03 dB (2.83 V)
Single Driver Passive Radiator Box Parameters:

Vb = 2.400 cu.ft
Vap = 6.000 cu.ft
Fp = 12.5 hertz
F3 = 20.8 hertz
Fill = normal
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Old 22nd August 2004, 10:26 AM   #2
Volenti is offline Volenti  Australia
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Well according to Bassbox6 those specs aren't quite accurate, but a sealed enclosure with a Qtc of .7 is 36L, with dacron fill you could pull this down to ~30L. F3 ~40-45hz
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Old 22nd August 2004, 05:18 PM   #3
zuki is offline zuki  United States
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this is the woofer

thank you.

http://www.gr-research.com/sub.htm
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Old 23rd August 2004, 10:07 AM   #4
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I'm sure you could get away with a sealed box of 1cu ft with a linkwitz transform. I wouldn't go any smaller. Now if you want really small then you might try an ELF box which would be smaller again, at the cost of a little output.

You really need to run some sims, have a look at how much power you need, and not have to use too much eq to get the low end you want.
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Old 24th August 2004, 10:24 PM   #5
zuki is offline zuki  United States
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i was considering using it in a car as the price was cheap and 2 would yield 4 ohms

but if i used the passives the box would be huge for a car
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Old 25th August 2004, 01:32 AM   #6
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Default small car subs

go to

http://www.hsuresearch.com/reviews/index.php?id=16

and look at the ASW1203 Also read the review of this car sub in the review section. much great data there, freq res power res and distortion figures. this driver will work in a simple 1 to 1.4 ft3 SEALED box and in a car ONE will hit 121 db @<10% THD at 12.5 hz.!! it has great power responce. > 117 Db 11 to 80 Hz!!! it costs $135!
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Old 25th August 2004, 08:12 AM   #7
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For a car I'd just do a sealed box as it will work well with the cabin gain and you don't need the extra low end or extra output unless you are the audio equivalent of a rev head! A small xmax 10" sealed sub that sounds wimpy in a living room sounds like a beast in a car.
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