| GM |
For a wide cab to 'disappear' requires it to be acoustically indistinguishable from the rear/side walls, so it will depend on its depth and how far from the rear/side walls it is to find where it blends into the room's gain curve. As a rule-of-thumb it's in the 30-48" wide range depending on the speaker's F6 and roll off slope.
GM |
|
|
| VanJerry |
| quote: | Originally posted by planet10
Both Demetri & Mileva are in this vien. They would only need fancy cabinet work...
Even with a full-range the wider cabinets don't seem to dissapear as well as their narrow heavily champhered counterparts. EnABL experiments are on-going to see if that can remedy the issue.
dave |
Hi Dave,
I sincerely appreciate the suggestion but I fear I'd be strung up if by this point I didn't go with a switchable damped vent semi-aperiodic BR/Tapered TL! :)
I know the Strad/Elipsa/PMS are supposed to be an ideal between ghostly apparition and solid presence, so I'm OK with not entirely disappearing. Especially if, as GM says, it would cost me an ironically imposing 30-48" to "not see them."
Out of curiouslity, if they could be made near aperiodic for a Cast 12, how much volume would ML Voigts still need?
No - wait a second! - After 401 posts this is a test isn't it? :)
Jerry |
|
|
| planet10 |
[QUOTE]Originally posted by VanJerry
I know the Strad/Eclipsa/PMS are supposed to be an ideal between ghostly apparition and solid presence, so I'm OK with not entirely disappearing.[QUOTE]
I do know the Elipsa have been the only speaker thru the local hifi emporium that i really enjoyed sitting down and listening to for an extended time, and the angled back baffle certainly has to help things... they were good enuff that i was very tempted to haul a set of Fonkens down to see if the SF could keep up thru the midrange.
dave |
|
|
| VanJerry |
Coming from a master of DIY that's high praise for the Elipsa, Dave.
|
|
|
| VanJerry |
Dave,
You are the person I would most want to ask about the diffraction aspect of this. You've been using truncated pyramidal baffles on a few designs.
If I were to make an ellipse I would use Troels Gravesen's method of approximating it with a few segments. Though I would then smooth the exteriors of these angles off a bit more.
So, may I ask these perhaps redundant questions:
1. Considering this is for a very large and likely directional FR driver, is such an ellipse going to be worth the bother over a truncated byramidal baffle?
2. If the elliptical front were built, is the addition of constructing the rear half worth the extra effort?
I'm thinking in terms of externals. I don't know, were you also thinking the internal curve was significant to what you heard as well?
Jerry |
|
|
| udailey |
So, to make the front baffle bend he had to cut long and deep on the rear of the front baffle to then glue them together in a curve. How are you going to approach cutting these? If you go on a tiny diagonal you will probably be alright but even the slightest bit left or right of straight and your cut wont fold. Its a fine design. I really love the way it looks. It looks, also, like a very very tough build.
Uriah
edit. On second thought maybe it would fold, not idealy if you goofed a cut, but probably would still work. Nevermind :) Great looking speakers. |
|
|
|
