Pole Piece Q

ALFIrE · 24th December 2004, 05:02 PM

Hi!

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???

Vikash · 24th December 2004, 05:27 PM

The driver won't blow if the pole piece vent is blocked. But it should no be blocked for proper operation.

Nappylady · 24th December 2004, 05:27 PM

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.

ALFIrE · 24th December 2004, 06:09 PM

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...

24th December 2004, 05:02 PM	#1
ALFIrE diyAudio Member Join Date: Oct 2003 Location: vlaanderen	Pole Piece Q Hi! 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???

24th December 2004, 05:27 PM	#2
Vikash diyAudio Moderator Emeritus Join Date: May 2003 Location: UK	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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24th December 2004, 05:27 PM	#3
Nappylady diyAudio Member Join Date: Feb 2003 Location: Salt Lake City	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.

24th December 2004, 06:09 PM	#4
ALFIrE diyAudio Member Join Date: Oct 2003 Location: vlaanderen	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...