TH-18 Flat to 35hz! (Xoc1's design) - Page 119 - diyAudio
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Old 26th October 2012, 03:50 PM   #1181
jbell is offline jbell  United States
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Quote:
Originally Posted by CRESCENDO View Post
I believe it was jbell who said that grill is quite flimsy. He recommended the Dayton square grill. This is what I'm using, along with acoustically transparent foam behind it to stop the 'ringing' of the grill and for an extra layer of drink-spill protection.
Correct -- the square hole dayton is rigid, the round hole dayton grill is not.
I would use the square hole on a sub, round hole on a top.
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Old 27th October 2012, 12:53 AM   #1182
Mark Kravchenko
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I believe mark suggested a flat sheet from PE that you bend up square as you need it.

That would at least fit, and be decently rigid.

But probably require a central stiffener.
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Old 27th October 2012, 03:43 AM   #1183
jbell is offline jbell  United States
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My problem is that on a dual 12" top with the dayton 8R grill (pre-bent with 1" edge) was almost too flimsy for top duty, and took several attempts to get it to stop rattling.

The 8S square hole is much more rigid.

Now, if you want something TRULY rigid.........
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Old 27th October 2012, 06:54 AM   #1184
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jbell, do you screw these in place? I know you plasti-dip the sides.
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Old 27th October 2012, 07:52 AM   #1185
djk is offline djk
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I just got enough expanded metal to do a pair of dual 12"+2", and a pair of floor wedges, all cut and formed with a 1" brake on the long edges, $12 each.

It sure is ugly, but it does the job.
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Last edited by djk; 27th October 2012 at 07:57 AM.
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Old 27th October 2012, 02:28 PM   #1186
jbell is offline jbell  United States
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yes plasti-dip the sides for vibration reasons.
yes screw top/bottom, friction fit the sides
yes, VERY cheap/VERY sturdy grill
(btw, I cheat... I don't have/use a break... just a wood clamp, and bend one ear at a time)

No... I don't think it has to be ugly.
Flattened mesh looks reasonably good depending on size in my opinion.
Amazing what a bit of epoxy paint does.

Last edited by jbell; 27th October 2012 at 02:34 PM.
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Old 29th October 2012, 05:32 AM   #1187
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Crescendo, when are you gonna get those mkii's ready for grimey?

Also when running an 8000 watt amp consider the power requirements, especially venues like Toho.
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Old 30th October 2012, 04:12 AM   #1188
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Custom 16ga grills bent to size.

Custom Speaker Grills and Covers
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Old 5th December 2012, 02:20 AM   #1189
kctess5 is offline kctess5  United States
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Here's my latest video. I tested everything I have built so far yesterday, and I am very pleased.

The subs are incredibly loud, even at somewhere between 150 and 200 ft away, not run at their full capacity. I didn't want them to drown out the main (I only have 1 done) speaker so I turned them down a little.

I trust that you guys have personal systems that go low enough to appreciate the depth extension in the video

PA Sound System DR250 TH18 Testing 2500 Watts - YouTube
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Old 5th December 2012, 02:36 AM   #1190
NEO Dan is offline NEO Dan  United States
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Click the image to open in full size.

NICE!
If you have an airport express you could get remote or airplay running and that'll let you run the track selection and volume from an iphone or ipod touch.
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Last edited by NEO Dan; 5th December 2012 at 02:38 AM. Reason: Or another router I guess...
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