Sideways Dipole Bass

[sdclc126]

Hi,

Does dipole bass need to face forward into the listening room in order to work, or does it not matter at the lower frequencies?

I'm purely concerned with aesthetics here actually, by making the woofers less visible from the front. I was thinking of taking an H-frame and turning it 90 degrees to the side so a finished panel would face forward, and then placing the mid/tweeter panel in the normal location above that.

For saving vertical space, could the H-frame be placed horizontally also? Perhaps a taller, line array type mid/tweet main panel could then go above the lower H-frame.

One more - picture a "tower" H-frame, with four+ woofers - turned sideways, could the now front-facing panel serve as a baffle for mid/tweet? I'm thinking the only way it could work is if the front panel is widened with "wings," extending out beyond the width of the H-frame. But then would the H-frame interfere with the dipole response of the mids?

Thanks.

[theAnonymous1]

By turning the dipole sideways you are effectively in it's null where the front and back waves cancel each other.

[sdclc126]

I wasn't sure if this would apply to bass, it being less directional. I suppose there would still be a null though.

[PeteMcK]

you can do that with a ripole
http://www.lautsprechershop.de/hifi/...i/ripol_en.htm

[sdclc126]

Yes I forgot about that - like the Linkwitz dipole woofer for the Phoenix. Can't do what I had in mind with an H-frame but can with dipole w/ woofers stacked and facing same direction.

I like that anyway - it saves a lot of space.

[CLS]

Originally posted by sdclc126
I wasn't sure if this would apply to bass, it being less directional. I suppose there would still be a null though.

The null is very very obvious. I've tried that with my W baffle bass module.

Even in indoor, the dipole bass is very directional.

[bzfcocon]

Originally posted by sdclc126
I wasn't sure if this would apply to bass, it being less directional. I suppose there would still be a null though.

This applies especially to bass. Its upwards in frequency where the dipole stops being a dipole(usually above a few hundred Hz).

You can use a variation of Ripole/W-baffle (I guess even a "half ripole" would do the job - I mean, only one driver mounted on the side of an U-Baffle)

[sdclc126]

Yes - I think one of the main design goals of dipole base is to BE directional, in order to mitigate room gain.

[ttr]

How about sideways woofer dipoles right beside front wall (maybe with a bit larger baffles than sketched there)? Walls are assumed to be thick concrete.



I don't have any excess wood to build some quick test baffles right now.

[y8s]

Originally posted by ttr
How about sideways woofer dipoles right beside front wall (maybe with a bit larger baffles than sketched there)? Walls are assumed to be thick concrete.



I don't have any excess wood to build some quick test baffles right now.

you're still on the null axis. and a reflected null is still a null.