best encl. volume for Eminence Lab 12 in a sealed sub? - diyAudio
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Old 14th November 2010, 11:10 PM   #1
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Default best encl. volume for Eminence Lab 12 in a sealed sub?

Researching a 12" unit for a small sealed sub and this driver seems to get the best reviews and goes low and loud
Eminence :: Eminence LAB-12 ONLY 129.99

I copied this from another forum (what is B2?) ; am I right in thinking that I should keep the box volume small for a low F3?

"The LAB12 requires 2.85 to 3.6 cubic feet for vented alignments. Sealed alignments are 1.8 to 3.4 cubic feet (B2 and D2 respectively). The sealed box is very forgiving for size changes. As the box size increases beyond the B2 size, the group delay improves, F3 moves higher, and power handling ability gets worse.

The LAB12 has an efficiency bandwidth product of 56, making it ideal for use in a sealed box."
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Old 15th November 2010, 02:16 AM   #2
bjorno is offline bjorno  Sweden
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Quote:
Originally Posted by Bill poster View Post
..The LAB12 has an efficiency bandwidth product of 56, making it ideal for use in a sealed box..
Agree, but would also work well in a large ported box too.

b

Time to get some
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Old 15th November 2010, 11:29 AM   #3
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need to keep the enclosure as small as i can, around 25 litres, a 12" unit is my optimum size. I was going to go for a mivoc but this Eminence works v well in a sealed and the new tangband 12" looks even better on the graph tho much more expensive..
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Old 15th November 2010, 05:58 PM   #4
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gti1214d is cheap in the US... $83.
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Old 17th November 2010, 09:29 PM   #5
azimut is offline azimut  Italy
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There is well documented project (only in Italian)

38,73 liters

AudioFanaticProgetti-Il_Bimbo.html
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Old 18th November 2010, 11:40 AM   #6
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The Eminence lab 12 does 38hz f5 in a 25 litre sealed but is perhaps more suited to large enclosures so thinking 10" is the way forward. The 10" dayton Titanic and TC epic 10' look good as a BR or sealed.. and they are for more suited to a smaller enclosure. The Dayton is especially good, I modelled it down to an F3 of 28hz in a 20 litre BR

Last edited by Bill poster; 18th November 2010 at 11:57 AM.
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Old 18th November 2010, 02:19 PM   #7
bjorno is offline bjorno  Sweden
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Quote:
Originally Posted by Bill poster View Post
..The 10" dayton Titanic.... look good as a BR or sealed.. and they are for more suited to a smaller enclosure. The Dayton is especially good, I modelled it down to an F3 of 28hz in a 20 litre BR
Are you sure?:

b
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Old 18th November 2010, 04:26 PM   #8
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hmm.. tried modelling it again and its 32hz (fb 29) not 28 hz; you are right.. what did I read wrong?

btw I'm using the dumax readings in linear team.

Still good tho!

Last edited by Bill poster; 18th November 2010 at 04:28 PM.
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Old 20th November 2010, 11:31 AM   #9
bjorno is offline bjorno  Sweden
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Quote:
Originally Posted by Bill poster View Post
..btw I'm using the dumax readings...
So did I, see the picture,the unique Dumax report doesn't improve f-3dB..

OTOH, I would prefer a sloping FR over a flat if a ported box: only if the port length would be different, i.e. much smaller, but not if I had the opportunity to choose the more powerful T-TQWT.

b
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Old 22nd November 2010, 10:10 PM   #10
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Wayne over at Pi speakers (Audioroundtable.com) has a design that utilizes the Lab12 (3Pi sub). I have heard it and it works well. Ask him for the design and he'll email it to you. I'm sure he has all the measurements he did as well.
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