[paba]

A narrow rectangular baffle at 45 in the corners of a room with top and bottom open, hung up on the wall at ear level? Baffle length about 2 or 3 times diver diameter and width just a couple inches on each side of the driver....

I think the WAF would be great but what about the imaging and who knows maybe some bass extension would come out from the corner load..

what do you think...
paba

[Russell Dawkins]

I think if you are lucky enough to have two corners where you need them for listening, that is pretty much equal angles to your left and right from your listening position, that very decent sound is possible from this arrangement.

I remember someone telling me one of the best sounds he had ever heard was from a pair of Tannoy 15s (the old coaxials) in just such an arrangement, where the baffle board was about 30" wide and went floor to ceiling in each corner.

Ideally, you would have some way to measure response in the room and "tune" the system with some sort of equalizer, but failing that you could make a removable sub baffle big enough for any driver you can imagine wanting to experiment with and just go to town and play with a wide variety of drivers.

You wouldn't have to worry about baffle step correction and could wind up with something that sounded way out of proportion to its cost.

I would go floor to ceiling or if not still seal the top and bottom and go infinite baffle. In either case I would use a fair amount of internal damping.

Don't forget to reinforce the back of the baffle board to make it stiff, or double up on its thickness for the same reason.

Good luck!

[Rudolf]

A narrow rectangular baffle at 45 in the corners of a room with top and bottom open, hung up on the wall at ear level? Baffle length about 2 or 3 times diver diameter and width just a couple inches on each side of the driver....

I think the WAF would be great but what about the imaging and who knows maybe some bass extension would come out from the corner load..

Placing speakers in the corners can be a good idea - if well done.
For bass your proposal would not be OB, but a kind of transmission line IMHO.
How about putting the woofer baffle at 30-45deg into the room, as suggested by Larry Selmer http://www.linkwitzlab.com/faq.htm#Q30 or Gradient http://www.gradient.fi/helsinki15/? You just need to avoid sitting in the baffle plane, because you will get the dipole null there.

[SAC]

There is a design for this with the Visaton B200.  It is sealed in this case but the theory should interest you.

As pointed out it would need to be well stuffed.  The Tannoys I think have complex horns behind that baffle.  I tried the board-in-a-corner you are suggesting but it was bad sounding (B200+alpha 15).  The easiest route would be the stuffed box in a corner I'd say.

http://www.visaton.com/en/bauvorschlaege/breitband/solo_eck/index.html

[paba]

Thanks all,

I like the infinite baffle idea, what Qts range works best for that?

I said 45 angles, but in reality since I sit about 12 ft away, the angle will be different, it was the idea that I was after.

So as a first experiment, I pushed my JE Labs OB right up into the corners. I get better imaging/stereo width but it does suck some life out of them.

I think, I hate experimenting with speakers. The process is too long. cut wood, glue, move around, toe in, position etc..  experimenting with circuits is much quicker. It is just me. Plus it seems there are just infinite things to try too many options. I want to spend less time in the garage with the tools and more time on the couch listening to music

I just have to find better WAF option to these JE labs. That's why I thought of corner boards just like that visaton example.

cheers
paba

[fine]

off topic but also available on PABA question:

Supravox 215-2000 and 2 x Alpha 15A .....will work passive into ob baffle?
The supra have 99 db spl.

[Rudolf]

Supravox 215-2000 and 2 x Alpha 15A .....will work passive into ob baffle?
The supra have 99 db spl.

Look at http://www.diyaudio.com/forums/multi-way/155803-eminance-15-beta-vs-dayton-dc380-8-ob-4.html#post1999675 for Martin Kings study for two Alpha 15A. They would be about 97 dB at 100 Hz on his proposed OB size.

[fine]

Thank you.
I think it will work because the 215-2000 it seems to have declarated 99 db only on 3khz.I presume is 96db without that peak.
http://www.supravox.fr/mesures/mes215_20001.htm

Thanks again.