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Topic: Insulation for closed back cabs |
Len Amaral
From:
Rehoboth,MA 02769
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Posted 10 Jun 2006 8:05 am |
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What type and how much insulation should you use in a closed back cab? I have a pair of single 15" cabs with a 2" port in each
corner of the cab. |
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Jim Bob Sedgwick
From:
Clinton, Missouri USA
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Posted 10 Jun 2006 9:23 am
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| I have used a piece of carpet in the past. Just cover the back panel and you're good to go. I'm sure there are many other ways to accomplish the same thing. |
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David Higginbotham
From:
Lake Charles, Louisiana, USA
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Posted 10 Jun 2006 10:02 am
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Len, I built my 15 inch cabinets 18x18x11 with four 2 inch ports. I used quilt batting for insulation covering the bottom and both sides. Works great and very inexpensive! I have no covering on the outside, only stain.
Dave |
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Rick Johnson
From:
Wheelwright, Ky USA
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Posted 12 Jun 2006 6:33 am
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Len
David is correct, quilt batting will
work fine. I'd guess 1.5" thinkness
should be plenty. I have seen cabs
that just had an oversized piece
placed in the cab hanging from
top to bottom.
I thought about trying a piece of
mineral wool. Its used in studios
to deaden sound. You can get from
an HVAC supply house, its used in
firestopping.
Rick
www.rickjohnsoncabs.com |
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David Doggett
From:
Bawl'mer, MD (formerly of MS, Nawluns, Gnashville, Knocksville, Lost Angeles, Bahsten. and Philly)
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Posted 12 Jun 2006 8:46 am
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Old carpet pieces work great, the thicker the better. Put it inside the back, top and one side. You don't really need it on opposing sides. Some reflection might actually help the highs. I'm not a big fan of filling the inside with insulation material. Seems to me you want the air to be able to move freely, to get maximum efficiency from the speaker, and to let the inside vibrations get out the ports to reinforce the sound coming out the front. I'm strictly an amateur when it comes to speaker cabinet construction. But this is what has worked good for me in a couple of homemade closed-back bass reflex cabs for 15" guitar speakers.
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Student of the Steel: Zum uni, Fender tube amps, squareneck and roundneck resos, tenor sax, keyboards
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John Bechtel
From:
Nashville, Tennessee, R.I.P.
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Posted 12 Jun 2006 11:19 am
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Years ago, I read that to insulate and control sound in a closed~cabinet the insulation should be placed so that two bare surfaces ‘do not’ face each other. That would be, for example: Insulation on the Back, one Side and the Bottom of the cabinet. That would amount to (3) or ½ of the total (6)-surfaces inside. [You have one-top, one-bottom, two-sides and one front and one back.=6] Put insulation on One-Bottom, One-Back and One-Side. You can also buy (1”) acoustic~insulation at Radio Shacks or Auto~Audio~Shops!
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“Big John”
a.k.a. {Keoni Nui}
Current Equipment
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Len Amaral
From:
Rehoboth,MA 02769
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Posted 12 Jun 2006 3:00 pm
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Thanks guys...I appreciate the feedback. I will checkout the local radio shack and see if they have the insulation material.
Lenny |
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