Mid Bass Horn Design 80-800 Hz

**bfish** · December 7th, 2007, 09:17 PM

After thinking about it, it occurred that without gluing/securing the horn panels into a solid, unitary mass, won't you gobble up a good portion of the horns gain in shaking the individual panels...(i.e. energy lost to the gasket)? forums

Further thought...isn't one of a rubber gasket's primary functions absorbtion of vibration to reduce the transmission of sound?

[ December 07, 2007 05:40 PM: Message edited by: bfish ]

GM · December 8th, 2007, 03:28 AM

Originally posted by bfish:

I've played with lots of gasket solutions........

Greets!

Neoprene ANSI flange gasket material is ideal for repeated closures at high pressure, it's what's used in harsh environment equipment enclosures. I've removed my 515 baffles dozens of times over the decades to rotate the drivers, which as you've experienced still seal well: http://www.mcmaster.com/ pg. 3352.

GM

GM · December 8th, 2007, 02:45 PM

Originally posted by bfish:

Funny how only a few years removed from hands-on wrenching has restricted my vision........

I know the problem well, 'use it or lose it' as they say. Wouldn't this material require too much clamping pressure for wood construction though?

Anyway, how you been? I sent several emails awhile back, but haven't seen any comebacks. Have you had a chance to look at the HK and/or Sony yet?

GM

**bfish** · December 8th, 2007, 04:01 PM

Yeah, I'm thinking of the red, fiber-reinforced material we used to use in hot/chilled water pipe flanges. Tough stuff indeed.

[ December 08, 2007 08:24 PM: Message edited by: bfish ]

**bfish** · December 8th, 2007, 05:42 PM

Yeah, the material (as we used it) used 5/8" flange bolts torqued to 50 ft/lbs...Granted though, it had to hold 100 psi at 90 degrees delta T.

[ December 08, 2007 08:23 PM: Message edited by: bfish ]

**Steve Mac** · December 8th, 2007, 11:52 PM

Thanks for the gasket ideas gents.

I finished the wedge base/top pieces today.
Anyway to cut out a pattern in plywood you
need a jig saw.
Cut as close as possible to the finished curve as you can safely... 1/8 -> 1/16 is fine.

You also need a router and a router bit with a ball bearing guide

Then just go slow, using one cut out piece as a guide for the rest: Wedge Base pieces

Next is to cut out the angled wedge pieces which will require a little more work than this 'cos the side angle changes.

**Steve Mac** · December 8th, 2007, 11:55 PM

Hey bFish....provide links to your pictures, don't embed images...that's why I opened this new thread...that is unless it's Brazilian supermodels...then it's alright. forums

**bfish** · December 9th, 2007, 01:58 AM

Sorry...

[ December 08, 2007 10:08 PM: Message edited by: bfish ]

**Steve Mac** · December 9th, 2007, 02:06 PM

Originally posted by GM:

Neoprene ANSI flange gasket material is ideal for repeated closures at high pressure, it's what's used in harsh environment equipment enclosures. I've removed my 515 baffles dozens of times over the decades to rotate the drivers, which as you've experienced still seal well: http://www.mcmaster.com/ pg. 3352.

GM

Nice, ...good website, I ordered some last night, thanks for this link Greg.