Grill material

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himhimself
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Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Grill material

#1 Post by himhimself » Wed Jan 30, 2019 12:34 pm

Picked up a sheet of steel for my otop grills. I couldn't get a good description when I ordered off Amazon and it's not exactly what I wanted but think it should work. Only $15 with free shipping for a piece big enough to cut 4 grills. Its 16g with 1" holes, about 55% open. Put in front of a bookshelf speaker and didn't seem to affect the sound so I'm going to keep it and try it out. Should give an 8nteresting look, painted black with foam or cloth behind.
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2xT30 (20", 3012lf)

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Chris_Allen
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Re: Grill material

#2 Post by Chris_Allen » Wed Feb 13, 2019 4:06 am

Get some pictures up when you have finished, should look good.
Built:
6xDR200, 2xT39, 2xT48, 2xJack110, 1xOmni10.5, 1xAutotuba, 1xT18, 1xSLA Pro, 1xW8, 1xW10

jimbo7
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Re: Grill material

#3 Post by jimbo7 » Thu Feb 14, 2019 8:15 pm

I'd paint the metal black and just stretch grill cloth over the front. Smaller hole'd grills would probably look the best. +1 on posting pics
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himhimself
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Re: Grill material

#4 Post by himhimself » Fri Feb 15, 2019 6:16 pm

Yep, definitely will post pics, but need spring to bring some warmer weather so I can resume my build. Stay tuned...and patient...
2xT30 (20", 3012lf)

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Bill Fitzmaurice
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Re: Grill material

#5 Post by Bill Fitzmaurice » Fri Feb 15, 2019 6:30 pm

It's counter-intuitive but where high frequency passage is concerned the size of the holes matters far less than the size of the area between the holes. If the space between the holes is a wavelength or more incoming waves get reflected backward, if the space is less than a wavelength the incoming waves make their way around the spaces and through the holes. The maximum span between the holes look to be about a quarter inch. That's one wavelength at about 13,500Hz, so no worries.

himhimself
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Re: Grill material

#6 Post by himhimself » Fri Feb 15, 2019 8:18 pm

Thanks for the info Bill, makes me more comfortable that I won't get an ugly surprise (sonic wise, perhaps not visually) when I put these to use. The price was just too good to not take a chance - grills for all 4 otops for less than $20!
2xT30 (20", 3012lf)

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Bill Fitzmaurice
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Re: Grill material

#7 Post by Bill Fitzmaurice » Fri Feb 15, 2019 9:59 pm

That's a fabulous price, you should share the source.

himhimself
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Re: Grill material

#8 Post by himhimself » Sat Feb 16, 2019 8:32 am

It was on amazon, listed as Carbon Steel Perforated Sheet. I just went back and looked at my order. I paid $15.56 for a 36"x40" sheet, with free shipping. That exact item now shows up at $54.62. There's another one listed now with smaller holes for just under $20 with free shipping. I may order one of those just see if it looks better.
https://www.amazon.com/dp/B00CZDOAEC?ps ... 2_t_img_lh
2xT30 (20", 3012lf)

himhimself
Posts: 211
Joined: Fri Nov 13, 2015 9:34 pm
Location: Bloomington IN

Re: Grill material

#9 Post by himhimself » Thu Feb 21, 2019 8:41 am

Got my second sheet. This has smaller holes that are 3/8", spaced 9/16" apart. Percent open is actually a bit less than the one with the larger holes. Nice solid material. Again , enough to make grills for 4 otops at less than $5 a cab, cant go wrong either way. C'mon, spring weather...
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2xT30 (20", 3012lf)

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