NaO Note II RS

[john k...]

Originally Posted by Bratislav

... or you can always try and shoehorn two SLS 12's. More Sd, more efficient, lower Fs, only extra 20 bucks. Would easily cover missing 3dB, and more.
Great design!
As always, I must add...

It would not be possible to get 12" woofers in the enclosure without making it taller (not a real problem) and wider (problem if I want to keep the design as is). I have four 12" SLS woofers so don't think I didn't consider them. The side panels could be cut at the base of the baffle and mounted on a bridge spaning the wider woofer cabinet, but then it get bulky. And it would net only 3.5 dB greater max SPL.

Originally Posted by ScottG

John,

I've sent an email with a sketchup file to you (music and design email account). After a few tries yahoo registered it as being sent.

Try not to laugh to hard at the result.

Thanks Scott. It's an interesting concept. A little too modern for me. Plus, the curved grill would make stretching cloth over it a bit difficult.

[markus76]

Originally Posted by ScottG

John,

I've sent an email with a sketchup file to you (music and design email account). After a few tries yahoo registered it as being sent.

Try not to laugh to hard at the result..

Wanna see!

[ScottG]

Originally Posted by markus76

Wanna see!

Are you sure? It's just a basic model.. The stipulation is that you not share/distribute it - if yes then PM (forum mail) me with your email contact and I'll send it to you.

[ScottG]

Originally Posted by john k...

Thanks Scott. It's an interesting concept. A little too modern for me. Plus, the curved grill would make stretching cloth over it a bit difficult.

Your welcome!

I can understand not liking the design. (..a bit of "tacking" can accommodate the grill cloth - it wasn't designed as a "removable" design.)

[john k...]

Originally Posted by ScottG

Your welcome!

I can understand not liking the design. (..a bit of "tacking" can accommodate the grill cloth - it wasn't designed as a "removable" design.)

My point about the grill cloth is that while it could be tensioned vertically any side to side tension would flatten the ark. There would have to be some kind of support behind the cloth, like perforated metal, to maintain the curvature when the cloth was stretched.

[ScottG]

Originally Posted by john k...

My point about the grill cloth is that while it could be tensioned vertically any side to side tension would flatten the ark. There would have to be some kind of support behind the cloth, like perforated metal, to maintain the curvature when the cloth was stretched.

Yes, "caving" can be a problem - especially for a longer run like the front (..the more pliable the material, the worse the problem). However certain starching products (fabric stiffener) can "get around this" ..but the result depends on the fabric (and the "stiffener").

Another possibility is layered vertical strips like a vertical blind curtain. If the strips are shear enough it might make for an interesting solution. (..it's interesting enough that I might alter the model to include this to get an idea of the result.)

I should also note that the curved portions are just one aesthetic choice (that I preferred) - you could always go back to a panel-like box shape. Just make sure to get the proportions "right" and make it symmetrical with the rear.

[ScottG]

I just looked through listings on fine wire mesh that could be used as a support base.. not cheap at about $5 a sq. foot.

Still, a synthetic organza + starch should perform similarly.

[john k...]

Originally Posted by ScottG

I just looked through listings on fine wire mesh that could be used as a support base.. not cheap at about $5 a sq. foot.

Still, a synthetic organza + starch should perform similarly.

This is where I'm at. The camera flash reveals the grill frame.

[gainphile]

Originally Posted by john k...

I've posted some updates. After experimenting with the system I decided to keep the tweeter x-o at 6k.

Have you made up your mind about rear firing tweeter at that frequency?

In my experience at 2.5khz the rear tweeter is only marginally needed. At 6khz hopefully it's not needed anymore ?

[ScottG]

Originally Posted by john k...

This is where I'm at. The camera flash reveals the grill frame.

Obviously we have rather different aesthetic preferences.. BUT that's a better picture (showing the intended result to better effect IMO).

Note: I *like* the reveal. It gives depth to the design. At once you can see a monolithic view while also seeing the technology behind it - sort of like a fine watch with part of the mechanics shown.

Suggestion: put your best "pic" forward on your website; i.e. replace the open view version with this new pic.

(..I'd at least get a metallic paint finish for the sub box in the rear (that's currently red) to match the mesh in front though. )

Did you know that Madisound has a metallic fabric they are selling for "grill" cloth? (..not a lot of help structurally, but still interesting):

The Madisound Speaker Store