Critic's Corner

Sorry for the memory fade! And about midranges...

108.34.204.30

John Marks

M

In Reply to: RE: Excellent, thanks! posted by E-Stat on July 28, 2024 at 10:01:25

I'd love to get a pair of Wilson Benesch Precision 2.0s to review, but they are in short supply.

WB listens to their own Different Drummer.

The woofer in the Precision 2.0 rolls off at -6dB/Oct.

Even better, the midrange Runs Wild! No networks; it is connected directly to the amplifier!

I can't think of anyone else who does that for a three-way design. (The 2.0 looks like an MTM, but the bottom cone is the woofer and the top cone is the midrange.)

john

Follow Ups:

Verity did... - Doug Schneider 22:36:18 08/01/24 (0)
A number of companies have created "crossoverless" midranges. It's nothing new. One that comes to mind is Verity, since the 1990s. The company closed up recently, but one of their hallmarks was always no crossover on the midrange, which created some issues of its own.

Doug Schneider
SoundStage!
RE: Sorry for the memory fade! And about midranges... - fantja 14:16:39 07/30/24 (0)
Great job! JM.
And about midranges... - E-Stat 13:36:51 07/29/24 (0)
I can't think of anyone else who does that for a three-way design.

Most have learned better than to run a driver more than an octave past its ideal range. Instruments spanning midrange and tweeter would sure sound funky with the disparate polar response.
I think Eggleston Works used to run the mids wide open on some models - Brian H P 13:10:51 07/29/24 (2)
They were using some Morel drivers with extended flat response at both ends. IIRC, they also used isobarically loaded pairs or trios for each driver. Morel happily sold them LOTS of drivers!
- My one subjective impression at a CES was that that speaker had a very narrow sweet spot - John Marks 15:06:09 07/30/24 (0)
  ... and that the midrange drivers were beamy and forward.
  
  I am totally aware that Bob Ludwig loved his Egglestonworks Ivys, but those were voiced to Bob's room and his preferences by having the crossovers' key parts swapped out, once the loudspeakers were set up in his room.
  
  ciao,
  
  john
- RE: I think Eggleston Works used to run the mids wide open on some models - hahax@verizon.net 18:31:11 07/29/24 (0)
  Triple isobaric makes no sense. Isobaric claims constant pressure on the outer driver because the inner driver moves in parallel. But it doesn't. The inner driver is loaded by its box and at some point the inner driver, of course, rolls off, causing the outer driver to also roll off. The main advantage of isobaric is a smaller box for the same bass roll off for the outer driver but at a price, 3 dB loss of efficiency since the inner driver out put is lost but it still uses power and the impedance is halved which can be low enough to make many amps cough(figuratively). A second inner drive only multiples these negatives.

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