- Technical Details
Note that the purpose of any gasket, whether it is on a speaker, a door, or a car engine, is to form-fit around any irregularities in the two surfaces being joined. In the case of the beam blocker, the speaker will be sitting on the beam ends when you first install it. Install the speaker (being careful not to overtighten) as you normally would and after a couple of days, the gasket will depress at that location and form-fit around the beam end. Some have suggested compensating at other mounting locations by stacking up washers or going as far as notching out the gasket for the beam end to fit in. I wouldn't recommend that, it could cause problems. The washers could cause the basket to warp, and the notching could cause the beam to rattle at high volumes.
Suggested For Front-Mounted Speakers: Install the Beam Blocker to your cabinets baffle using slightly longer screws than those already used to mount the speaker. Next, add a nylon rack washer (midlantic) then a steel flat washer for stability and then another nylon rack washer (these dampen any vibrations and also protect the metal mounting plate of the Beam Blocker. Carefully tighten the two screws until the Beam Blocker just touches the speaker gasket, be careful not to over-tighten and compress the gasket.
Customer Reviews of 12" Beam Blocker (5" Dome)
The modification #1 at the bottom of the description is the research that I provided several years ago, as is the diagram of the mounting - for front-mount cabinets, like the Mesa Boogie Mark series amplifiers.
I have used the Weber Beam Blockers successfully for a number of years, and own about 5 of them I think. I won't use another cabinet WITHOUT one! When you play the small clubs, like I do mostly, you are on top of your gear, and taking the full brunt of the audio - leading to tinnitus. The Beam Blockers, in my opinion, take the harshness out, and STOP the beaming effect, reducing audio injury due to high volumes and beaming.
I continued to modify the original design, and then submitted my findings just before Ted passed. I got a nice reply, but haven't seen that design update mentioned nor offered. I suppose it would involve a re-tool. At any rate, this is a GREAT product, a Ted left us with a great tool!
Here's a link from today - 110316: [http://i556.photobucket.com/albums/ss4/tboehlert/secret_03_zpsjt9x4co3.jpg]
It's a 12", with 5" Dome, installed into a Mesa Boogie Mark 1 Reissue ('95) over a Celestion MC90 branded 90W 8ohm speaker. This one is NOT modified to my new design tweak.