[versus rider]

I have been running alpha 15' on a 54mm thick tapered baffle for some time now and since I gave up on the 8" full range in OB and went with a 200Hz tractrix and Raal ribbons I have found the sound I am happy with. Whilst talking with my friend about finishes he suggested enclosing the sides of the baffle to make them look more domestically acceptable so yesterday I started to do that, completing one side of the first baffle. Today I will do the other side and listen to it compared with the open baffle. Its like a tapered box open at the back so what should I call it, its neither open baffle nor box. It may yet prove to be a non starter if it spoils that sound I have captured.

[JohnR]

Open box?

Although.. I'm not sure what the sides are on... the horn and ribbon?

[versus rider]

Open box?

Although.. I'm not sure what the sides are on... the horn and ribbon?

open box is what I thought, does this mean I am banished from the OB forum? Surely the H frame gang would have to leave too. The sides are on the bass section, the horn sits on top, the ribbon within the " box " but is not dipole so has no bearing on its sound.

[mcgsxr]

I would call that an open box.  I think you can still hang out with us - it sure isn't a closed box!

[Rudolf]

Wouldn't a box without the back qualify as a "U" frame? Thought we had everything covered with our X frame alphabet. 

Rudolf

[versus rider]

Wouldn't a box without the back qualify as a "U" frame? Thought we had everything covered with our X frame alphabet. 

Rudolf

no it has four sides, maybe a square o frame?

[opnly bafld]

Wouldn't a box without the back qualify as a "U" frame? Thought we had everything covered with our X frame alphabet. 

Rudolf

+1
acoustic resistance box ~ open back cabinet ~ U frame

[JohnR]

The sides are on the bass section

As others suggested, that would probably be a U frame then. Have you tried putting damping in it? See JohnK's site for all the info on that... hang on ... here it is:

http://www.musicanddesign.com/u_frame.html

[JohnR]

PS versus rider, your image is huge. Makes the thread hard to read.

[versus rider]

PS versus rider, your image is huge. Makes the thread hard to read.

sorry how to make it smaller?

[JohnR]

sorry how to make it smaller?

Don't know, it's on photobucket...

[Chops]

Yeah, I would say it's just a U-frame baffle at this point. Keep in mind, you may start to notice some kind of chamber resonance with this design over your original flat OB.

[mcgsxr]

If you Google pic resize there are a number of free services out there.  I used one to create my avatar from an oversized pic.

[6thplanet]

PhotoBucket has a picture edit function, that's how I resize my pics.
That's a heck of a horn you have going on there! and a RAAL to boot....!

[versus rider]

Don't know, it's on photobucket...

when I post on hifiwigwam the same image comes out smaller