TH-18 Flat to 35hz! (Xoc1's design)

[jbell]

Originally Posted by CRESCENDO

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.

[mwmkravchenko]

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.

[jbell]

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.........

[CRESCENDO]

jbell, do you screw these in place? I know you plasti-dip the sides.

[djk]

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.

[jbell]

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.

[archiesmooth]

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.

[archiesmooth]

Custom 16ga grills bent to size.

Custom Speaker Grills and Covers

[kctess5]

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

[NEO Dan]

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.