Distance to Grill using a Peerless 12" XLS (830500) - diyAudio
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Old 20th April 2004, 07:25 PM   #1
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Question Distance to Grill using a Peerless 12" XLS (830500)

Subject: Mounting a 12" XLS with 10 mm foam grill. Look at the schematic drawing below!

GD = grill-distance

Proplem:
  • The driver can touch the grill if GD is to small.
  • For my design I would like to minimize GD

The linear xmax for the driver is 12 mm, but that is the excursion of the cone - not the rubber front of the driver, which I find not move as much as the cone.
I have tried to estimate the nessesery GD by playing 25 Hz in free air very loud - and I found that GD = 13 mm should be more than enough - can this be true?
Does anyone have experiences by the minimum of distance to the grill on an 12" XLS?

Regards,

Ask
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Old 20th April 2004, 10:53 PM   #2
Mudge is offline Mudge  United Kingdom
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Set it to whatever you like, then mount the grill very loosely. If the grill falls off, you know you should be turning things down
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Old 21st April 2004, 07:22 AM   #3
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67 Views and only one joke

Do all of you 12" XLS fellows really think that the driver is so good looking that you don't use a grill?

I think it's pretty to, but what about dust-damage?

And what about the design when you have grills on the tweeter and mid/wof - It would not be nice with only the XLS naked. (Just my opinion)

- Ask
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Old 21st April 2004, 11:09 AM   #4
Mudge is offline Mudge  United Kingdom
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Sorry, I was being semi-serious. I would think that a 10mm gap between the top of the surround and the grill would be plenty, and if you do manage to knock the grill off, you probably are exceeding the useful operating range of the driver.
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Old 21st April 2004, 12:43 PM   #5
Vikash is offline Vikash  United Kingdom
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I don't think you will get a definitive answer on this one (but maybe you will), so just experiment by running her at max and putting some cloth or the foam in front and slowly bring it closer to the sub until it just touches - then measure that distance.

Any particular reason you're using form and not the usual thin net type grill material? If I wanted the grill to be as close to the enclosure as possible then I would use thin material and inset the drivers.
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Old 21st April 2004, 06:31 PM   #6
sreten is offline sreten  United Kingdom
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Just note the top of the roll moves ~ 50% of cone excursion.

sreten.
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Old 21st April 2004, 09:50 PM   #7
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I dont build grilles in any of my speakers. I like to see drive units my brother on the other hand thinks they are ugly.

Dust damage?? have not heard that one before. Now toddler damage thats real! I was a trogen of war for killing dustcaps in my youth.
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