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Old 6th March 2011, 06:41 PM   #1
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Default absorbent material ?

Ok, I'm in the process of final sanding/finish work on a pair of Fostex FE206e BLH cabinets. I know about most of the home brew upgrades.

My question is would 1/2 to 3/4 eggcrate foam serve as "absorbent material" for the compression chamber?

BTW I am planing to build the Sachico horns next. The Fostex horns sound better than anything else I have listened to-I have no NEED for reams of graph paper to make me like them.

Thanks all.
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Old 6th March 2011, 09:47 PM   #2
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Eggcrate plus fiberfill?
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Old 6th March 2011, 10:27 PM   #3
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No, imho. Eggcrate foam or almost ANY other foam is an inferior sound absorbing material.

Of course a lot depends on what you want to "absorb"?? And, how much you want to absorb (ie. how many dB at what frequencies).

There are published graphs for absorptive materials.

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Old 6th March 2011, 10:59 PM   #4
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Eggcrate foam IME causes too much damping if located near a driver, and it is likely to sap the subjective dynamics. It may sound good if the speaker is only to be played very loudly.

Carpet pad is a better choice for a fullrange driver IMO.

YYMV of course, and it's possible it might work in some situations. Experiment and see for yourself.
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Old 6th March 2011, 11:09 PM   #5
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I was lucky enough to find some wool felt for my project and it worked well. You could also get some 1/2" or so acoustic fiberglass ceiling panel material. Cheap and effective. Use yellow carpenters glue to fix it inside your cabinets. Start with the back, front and one side. If you need more you can add some pillow batting through the driver cut outs.
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Old 7th March 2011, 01:51 PM   #6
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Thanks all
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