"Wings" for my A4's

[Cal Weldon]

Can I just fasten a sheet of plywood on either side?
What about angling them inward for more of a horn effect? 90 degrees?

Thank you
Cal

[stpower]

Cal,
Build them as Altec did, with 3/4 plywood on 2x4's on 16" centers. Use kick braces to brace to the rear edge of the 210 side. Make it as solid as possible. Angling the wings won't help, just make them straight.
Most people don't realize that besides improving bass, the wings also act to stiffen and brace the sides of the horn mouth which vibrate and flap on any loud bass. The 210's that so commonly have the wings missing are not performing up to their full potential and get blamed for having poor bass and boxy sound because of the loose horn mouth sides and Allison effect.

stpower

[Mirrophonic Sound System]

I have been thinking of doing the same with the WE 'W'- type horn.
It's a great idea especially when you consider that theater
horns were depth-compromised due to lack of space behind
many screens.

Start experiments with a 45 deg angle and a 'lid' on top and seal those honkin' reflex ports

[Cal Weldon]

Thanks stpower,

Those are soothing words

Cal

[dhook17322]

The WE "W" type horn - are you refering to a Shearer horn? The pictures I have seen of them do appear to have wings of some sort.

[Mirrophonic Sound System]

Yes the WE had wings and the idea would be the same:
maneuver them forward so that they continue the flare
of the horn - thus lowering the cut-off frequency (as
we are not limited by screen-to-wall space restrictions)

[Cal Weldon]

I am now thinking of using doors as wings. The hinges would allow me to remove them easily and change the angle at will.

Cal

[Mirrophonic Sound System]

Let us know how the experiments go

[Cal Weldon]

I will let you know how they go, but those are on hold for a bit. I'm working on my A7's, just finishing the crossover. Here in Vancouver this is a rainy season, so I'm waiting for a dry day to try the little one's out in some old cow field.
Sorry but they're not original drivers and they really live up to the name Loudspeaker. I need to be quite aways away to appreciate them.
WhenI'm finished testing, and cabinet finishing, I will return to the big ones.
Putting doors on them seems to make so much sense.

Cal