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Old 27th July 2006, 12:17 AM   #1
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Default Grille Beams

I am the oldest in a family of 4 boys, so protecting my speakers is very important.

What im not sure of is how putting bars in front of my driver will affect the sound.

Here are two quick sketches of the ideas for a guard, with grille cloth in front of it.

Click the image to open in full size.

Any preferences? Am I worrying about nothing?

Thanks
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Old 27th July 2006, 12:51 AM   #2
phn is offline phn  Sweden
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Go ahead. Use what you like. None of them will affect the sound. Otherwise, imagine what this would do to the sound.
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Old 27th July 2006, 02:55 AM   #3
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Hardware cloth (wire grid fence material) would give more complete protection.
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Old 27th July 2006, 04:37 AM   #4
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thanks, but its a fairly small speaker (4.5") so I think a couple of beams should be sufficient, thanks for your help fellas.
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Old 27th July 2006, 06:37 AM   #5
dnsey is offline dnsey  United Kingdom
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You don't say what sort of a driver it is.
At low frequencies, I agree that there will be little discernable effect, but if the driver delivers HF, it's a different matter. In that case, I'd make the bars as narrow as possible, and radiused - metal rod or heavy wire would possibly be the best material. I'd certainly go for the 'double-bar'' arrangement in any case, as the obstruction will affect high frequencies (radiated from nearer the centre of the cone) less.
As always, the best answer to your question is to try it and listen!
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Old 27th July 2006, 04:12 PM   #6
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Thanks, I was thinking the same thing as far as the double bar goes.

The driver is a Fostex fe127e fullrange driver. I think I will try a couple of bands of wire or thin rods as you suggest.

Thanks again
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Old 28th July 2006, 04:59 PM   #7
MBK is offline MBK  Singapore
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I use aluminium hardware grille (easier to bend than steel), glued in place to the cabinet with black rubber cement. This is for a 6.5" driver. You could also try one of the various computer fan stainless steel / chromed / plastc grilles, those are radiused and have only a few wires, and should fit a 4.5" driver.

Oh yes, my 22 month old does bang stuff against the grille... fingers, toy cars, sticks, I would not count too much on one bar or two. My grille has a few notches already (drawback of the soft alu).

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Old 31st July 2006, 05:31 AM   #8
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Great idea man, cant believe I didnt think of that considering how much of a geek I am. Just putting another coat on my speakers so maybe I will order a pair of 120mm grills, as they should be larger than 120mm which is 4.7" which will be just about perfect, so thanks for the idea.
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