Quick question on polyfill in a push/pull enclosure - AVS Forum
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post #1 of 6 Old 10-10-2012, 08:41 PM - Thread Starter
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A while ago I asked about isolating the polyfill in a push/pull enclosure from resting on the driver. However I didn't ask whether or not it was necessary. I have 2 push/pull subwoofers in this alignment (sub facing in on bottom, sub facing out from the "front"):


Do I need to use some netting or something similar to isolate the polyfill from the drivers or can I just fill it like a regular sealed enclosure?
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post #2 of 6 Old 10-11-2012, 05:31 AM
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The magnet of the one driver and the cone of the other should not be in contact with damping.
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post #3 of 6 Old 10-11-2012, 05:49 AM - Thread Starter
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Excellent, thanks for the response!
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post #4 of 6 Old 10-11-2012, 10:34 AM
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Quote:
Originally Posted by Bill Fitzmaurice View Post

The magnet of the one driver ... should not be in contact with damping.
Isn't that sort of hard to accomplish? What's the harm in having the polyfill touch the motor assembly?
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post #5 of 6 Old 10-11-2012, 10:41 AM
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Quote:
Originally Posted by RTSW View Post

A while ago I asked about isolating the polyfill in a push/pull enclosure from resting on the driver. However I didn't ask whether or not it was necessary. I have 2 push/pull subwoofers in this alignment (sub facing in on bottom, sub facing out from the "front"):


Do I need to use some netting or something similar to isolate the polyfill from the drivers or can I just fill it like a regular sealed enclosure?

My old M&K push-pull sub had a wire mesh inside the cabinet that kept the polyfill stuffing from touching the driver on the bottom.
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post #6 of 6 Old 10-11-2012, 11:09 AM
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Quote:
Originally Posted by Stereodude View Post

What's the harm in having the polyfill touch the motor assembly?
Heat build up.

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