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What you can say about lowbass and midbass perfomance for high end loudspeakers ?

i listen Egglestonworks Viginty  and find out the play increadable bass performance , especially punch bass
The company claim the two 10" woofer working as  passive sub with cross point 100Hz, and 2  6" midwoofer is
responsible for midbass get very good punch bass,  They say to produce good bass the need to split bass, becouse  
low base woofers get big moving mass cone , and work poor for punch work (too heavy )  Do anybody agree?
But this issue can be find in big speakers with 10"-12"woofer, For small floorstander is not applicable
128x128bache
twoleftears's avatar
twoleftears
5,318 posts
 
Designers started moving aggressively towards multiple smaller diameter woofers driven largely by a desire to make enclosures narrower, a desire driven in turn by a desire to make speakers more self-effacing in domestic rooms.  The faster small woofer idea is an ex post facto "justification" for a trend/change driven by other considerations, of a less purely acoustic nature.
bache's avatar
bache OP
520 posts
 
But smaller diameter woofers never get bottom low base compare to
big 10-12woofers., the reason a lot a top end designers still make
loudspeakers with big size woofers
twoleftears's avatar
twoleftears
5,318 posts
 
Yes!  A number of designers still using 10-12 inchers; Daedalus, for example, that was using 8", just came out with a couple of models using 10".
bache's avatar
bache OP
520 posts
 
Actually more important the cone moving mass , in pro line the using 
big size cone  like Eminence Omega Pro 15A  15" driver with 94 gram.
Some 8" woofer is using in High End get same cone weight. This is 
reason we always like good punch in club , in Pro audio. Nobody
care about listen double bass . I  think is the reason why a huge
amount of folk like Tektone. the using 10" Pro line drivers with low
moving mass and get good punch

audiokinesis
2,737 posts
 

@bache wrote:

"Actually more important the cone moving mass , in pro line the using
big size cone like Eminence Omega Pro 15A 15" driver with 94 gram."

The Omega Pro 15A is an excellent woofer, and as you point out its moving mass is not very high.

I’d like to use this woofer as an example to illustrate something about good prosound woofers that most audiophiles are unaware of.

Everybody knows that big cones are slow, right? Well in some cases that’s true, but not in this one. The specifics matter.

The Omega Pro 15A is arguably faster than a good 5" midwoofer, like the ScanSpeak Revelator! I’m not talking about top end extension - I’m talking about raw power-to-weight ratio ("weight" in this case being the moving mass of the cone).

We can use the formula BL^2/Re to see how much force a woofer’s motor applies to the cone for a given power input.

And we can divide that by the moving mass to get the power-to-weight ratio.

If we make this calculation, we find that the Omega Pro 15A’s power-to-weight ratio is about 30% higher than that of the 5" ScanSpeak revelator!

But that’s not the end of the story.

The Omega 15A also moves almost SEVEN TIMES as much air as the little ScanSpeak. This translates into about 16 dB more displacement-limited headroom (each doubling of displacement = +6 dB).

So the next time someone says that XYZ speaker can’t possibly be "fast" because it uses a big prosound woofer, don’t be so sure. That big prosound woofer may actually have a better power-to-weight ratio than the cute little midwoofer in your favorite mini-monitor.

Duke

prosound woofer advocate

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