suggestions for designing OB/dipole using AN's

[radianceaudio]

oops, I posted this in the wrong place to start....doh!!! I hope I put this in the right place this time.

so, starting over. Yeah, I can muddle through this on my own, but I was hoping someone might have suggestions that would give me guidance for this project:

What I wish to do is this: I have a number of Audio Nirvana's (don't ask why.....), both 6's and 8's.

I have decided to make a dipole or tuned OB using them, thusly: crossover in the tube amp (before the cathodyne stage) at 310 Hz (linkwitz PCB from Elliot);

send everything above the crossover through the tube amp to the Audio Nirvana in some sort of baffle open to the back - which should, I think, avoid the issue of the impedance peak in the low bass -

and send everything below 310 to a mosfet plate amp driving a subwoofer. (Yeah, I know, there will be intersecting curves).

The front panel would have the AN mounted up top, the subwoofer mounted down lower. I was thinking the Dayton 12" 23 Hz to 600 Hz or something like.

The question is, how to calculate width, depth, heights, angles of side walls, and depth of side walls per subwoofer and per AN...and whether to go for dipole a la linkwitz or a "tuned" OB design.

The Orion appears to have more depth for the subwoofer, to prevent the side-reflections and backwave cancellation, I presume, then the sides curve toward the front and don't have much depth for the mid and tweeter. 'Course, in mine, the mid and tweeter are combined in the AN and I don't feel the need to add a tweeter 'cuz the amp starts to round off the treble at 15 KHZ anyway (and I don't seem to hear much above 15 KHz anymore anyway! .

I wuz gonna just buy the plans for the Orion and modify, but don't have the money for them...yet.

suggestions?

Best, Charlie

[pelanj]

Hello,
I am somehow planning something similar. I guess the only way is to build models from foam / cardboard and measure - I am afraid that any side wings, etc. make it unpredictable. Just draw something similar - nice and smooth.

[radianceaudio]

What a great idea!

I could use sheet-rock, which is easily cut to shape by hand, and just tape it together, and mounting the speakers can be done easily by hand also using sheet-rock screws.

The sheet-rock (gypsum board) would have, I think, the added advantage of having mass and not being very resonant (although I'm sure it has a resonant frequency it will happily vibrate at).

I'll cobble up several markedly different designs, and listen to 'em.

Thanks.

Best, Charlie

[g4ready]

just wondering what ever happened to that sheet rock / open baffle experiment ... any pictures? any thoughts?