Cabinet material Measurement

[Scottmoose]

Something you see taken to new heights in the Fujisti TEN loudspeakers.

dave

Like the driver mounting -not (at all) convinced about the rest, based on the older compact pair I had through here a while back. 😉 Although in fairness, I've heard worse. Those 12in Fanes for e.g. that were all the rage for a while, which sounded like a skelleton being heaved through a skylight onto a bed of nails.

 

[Scottmoose]

Well no, it doesn't. If box vibrations can be cleaned up so as to be non-resonant with a nice even spectrum (not necessarily flat but without big spikes or bad phase either), then by then I think the interference pattern should be pretty benign.

Except that cannot be benign, since it's neither a/ non-resonant, and b/ time delayed and therefore causing destructive interference with the direct output from the driver. If you can shift panel resonance to a frequency where there is little energy to excite them, and then (where necessary) damp out what is remaining with the minimal amount of material necessary to do so -that's another matter of course. The box / panels are functionally non-resonant as a loudspeaker, and therefore have no audible effect.

 

[WhiteDragon]

yeah thin paper 12" pretty tough to do.
many more than just that one.
Is what it is. midrange will be there.
but it is gonna have a lot of paper in it.
as we always described
skeleton through a skylight LOL that's a lot of paper

 

[planet10]

But killing the reactive movement of a driver is more important in a driver producing higher frequencies

Let me add that with the case of woofers, one can largely eliminate the effects of the reactive force by mounting pairs push-push and taking advantage of sctive reaction-force cancelation. Almost like getting something for free.

dave

 

[AllenB]

If box vibrations can be cleaned up so as to be non-resonant with a nice even spectrum (not necessarily flat but without big spikes or bad phase either), then by then I think the interference pattern should be pretty benign.

You're bringing up some important topics. I'm not sure I quite relate to this one. The nature of the interference will be mostly set by the relative locations of the sources. The levels and also the phase would have what I'd think of as a secondary effect, since they modify the main effect.

 

[DrBoar]

The crossover runs the tweeter above 8 kHz or so so any modern tweeter should be able to handle that top range.
The midrange crossover only has a high pass filter so the midrange might fill in a part of the tweeter range.

 

[IamJF]

Why would someone want to do that in a high quality loudspeaker?

 

[GM]

Yeah, mids are ~250-6 kHz, nearly a point source driver's max (5) octaves, so 'stretching' it a bit too much for me.