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Old 24th December 2004, 05:02 PM   #1
ALFIrE is offline ALFIrE  Belgium
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Default Pole Piece Q


I'm building a speaker using the seas L12RCY/P

One of the drivers has an open pole piece "a hole in the back".

The other driver has a white substance in the pole piece, glue I think.

I assume I must open the hole, make it free?

Otherwise, I will blow the driver???
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Old 24th December 2004, 05:27 PM   #2
Vikash is offline Vikash  United Kingdom
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The driver won't blow if the pole piece vent is blocked. But it should no be blocked for proper operation.
"The human mind is so constituted that it colours with its own previous conceptions any new notion that presents itself for acceptance." - J. Wilhelm. (But I still think mine sounds better than yours.)
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Old 24th December 2004, 05:27 PM   #3
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Try the driver at low levels. It will probably sound fine. As you inrease the excursion, you might hear some strange sounds--if you do, this means you must remove the white stuff. If you can drive the unit to full linear excursion without it sounding really wrong, then you don't have to remove it.
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Old 24th December 2004, 06:09 PM   #4
ALFIrE is offline ALFIrE  Belgium
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at a fast first test, one souded fine, the other really distorted... as if the amp was going on and off and cracking all the time...
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