No replacement for displacement? I guess the 30" EV subwoofers can move quite a bit of air and play loud enough, hehe
as loud as the JBL system is, i'm very surprised to see it in anything smaller than a church, theater, roller skating ring, etc. those things can make your ears bleed!
this chap has huge dynamic range from 20 hz ~ 20 kc!
exactly what is wrong with OSB, apart from the fact that it isn't the prettiest stuff in the world?
when I built the cabinet VP with 3/4" OSB with a single driver brace (from back of the driver to rear wall (1x1"), I noticed significant resonance (putting hands on the cabinet while music is playing). For me "dead" cabinet is the best (does not add any sound). In my experience MDF seems to be best, followed by plywood, but no more OSB for me.
Latest build here: http://www.diyaudio.com/forums/full-range/195276-el-cheapo-driver-suzy-chang.html, I added thick panels (glued MDF/plywood) and noted significant improvement in sound. So simply put OSB is not good as speaker cabinet IMHO.
Regarding dead cabinets i found a pretty dead one in a swedish hifi store.
YG Acoustics Anat III
"Anat™ III’s mighty cabinet is constructed of precision-machined aircraft-grade aluminum alloy. This material, using vibration-free pressurized assembly, allows for the most acoustically desirable enclosure available. Unique to YG Acoustics™’ flagship line is the use of a multi-layered structure optimized for each module’s specific frequency range. This ensures the lowest vibration available, even at extreme volume levels."
Knocked on them and it was like knocking on a tank.
and that's guaranteed to ensure good sound?
slightly OT, but totally insane / obscene / criminal, even an April fools joke:
Solid Gold Organic Harmony Speaker adds music to the sculpture for $6.8 million
Never said it sounded good, i didn't even listen to them. All i did was looking at them and knocking on the side panel noticing it was one very dead cabinet.
Nuconz,
Showing this picture to one's significant other is likely to result in foreclosure of speaker building dreams... or the relationship!
Actually if I were most guys I'd show that photo to my wife FIRST and then I'd ask her isn't she happy how little I've kept my audio system for her?
Thetubeguy1954 (Tom Scata)
Sorry, I guess I consider some of these designs way over-engineered /built - this isn't the Space Shuttle -
And I'm yet to be convinced that no matter how achieved a "dead" cabinet is essential. The most "dead" speaker enclosure I've ever (not?) heard was one diamond cored from a basalt rock pillar - actually a very pretty piece of work. Of course this was a DIY/artisan project, but perhaps due as much to use of SEAS Excel series drivers and less than stellar XO design as to the enclosure materials, it was as musically moribund as it was acoustically inert - it made sound, but there was just no synergy.
Not in the sense that Chris means. And from the picture, likely under engineered for the energy it needs to contend with.
Does give you an idea of how big a bass horn needs to be. If one assumes free-air use, extension limit on the bottom estimated at 35 Hz (if the female is 5')
Will require digital delay.
dave
Does give you an idea of how big a bass horn needs to be. If one assumes free-air use, extension limit on the bottom estimated at 35 Hz (if the female is 5')
Will require digital delay.
dave
certainly an extreme performance concept - over-engineered to the specific goal? who knows
"dead"? - quite possibly not -
does that matter? - sorta my point - were is the threshold at which striving for that becomes a diminishing return?
or DCM Time Windows / Spica SC50 - essentially sectioned Sonotube with particle board baffles and solid wood end caps -
or British Tangent speakers circa 80s - thin and strategically braced
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maybe we need to use some concrete to make it truly inert?
LOL! Must be a b**ch on the hills.
jeff
dead as inert or dead as in frivolous attempt?
it seemed the original statement indicated inertness of the enclosure.
lowther ex4 in hedlund horn
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
