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Two 10" Type R -- spec says .6 cubes -- too small?

Old 05-25-2011, 12:02 PM
  #1  
50 Watt CAFz'r
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Two 10" Type R -- spec says .6 cubes -- too small?

Have two subs, shopping for a sealed enclosure.
Here's the sub specs:

Nominal Impedance: 2 ohms + 2 ohms
Frequency Response: 24-600Hz
Sensitivity: 83Db
DC Coil Resistance: 1.85 ohms + 1.85 ohms
Inductance (LE) 1kHz/20kHz: 2.48 mH/1.06mH

More on it could be found here:
http://vault.alpine-usa.com/products/documents/OM_SWR-1242D.PDF



Here's the enclosure dimensions according to Alpine:

Mounting Depth: 172mm (6.8)
Mounting Diameter: 231mm (9.1)
Mounting Displacement: 0.05ft3
Sealed Box Volume Range: 0.5 0.8 ft3
Sealed box External Dimensions: 11.5 x 11.5 x 12.75
Gross Internal Volume: 0.65ft3
Net Internal volume: 0.6ft3
F3: 49Hz QTc: 0.65

But a shop has now told me that those subs need more room than the .6 cubes per sub. They recommend something closer to a full cubic foot per sub.

Before I take that advice, does anyone here buy that? Has anyone tried the Alpine recomended enclosure and then something else to compare?
canuckerjay is offline  
Old 05-25-2011, 01:12 PM
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They work ok in .6, but much better in .8-1.0 cubes. If you need them in a small box then add about 1/2-3/4 pounds of polyfill for each sub...that will give you a virtual volume that is about 20-25% more. I've had the 12 in a 1.0 cube sealed (with 1 pound polyfill) box and it sounded very good...really tight, clean bass, and got more than low enough for music (could play tocata in d minor easily and shake the whole car).

Last edited by Denonite; 05-25-2011 at 01:18 PM.
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Old 05-25-2011, 11:09 PM
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Originally Posted by Denonite View Post
They work ok in .6, but much better in .8-1.0 cubes. If you need them in a small box then add about 1/2-3/4 pounds of polyfill for each sub...that will give you a virtual volume that is about 20-25% more. I've had the 12 in a 1.0 cube sealed (with 1 pound polyfill) box and it sounded very good...really tight, clean bass, and got more than low enough for music (could play tocata in d minor easily and shake the whole car).
0.8 cubes, lovely.
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Old 05-26-2011, 01:18 PM
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^^oh yeah, type r 10's in .8 sealed with 1/2 pound poly will sound great! Try it with and without the polyfill...it'll sound good either way, i just think poly helps to smooth out the bass a little more and give a little more extension down low.
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