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Old 22nd May 2012, 11:29 PM   #81
theJman is offline theJman  United States
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Originally Posted by vaugi View Post
I'm not sure exactly why some BMR models are on CSS but not Hi-wave (some kind of exclusivity, or marketing exclusivity?). I might ask James Lewis, the CEO, as I'm a shareholder (for transparency I thought I'd mention it too).
I would love to hear what he has to say about all this. It may clear up an awful lot.
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Old 11th June 2012, 07:14 PM   #82
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Does anyone have an availibility date for the HIBM85C20F or (especially) the HIBM65C20F?

I was about to pull the trigger on a purchase but put that on hold when I saw this thread.

Also, the PE link for the HIBM85C20-4 is not working. Is there some other source?

Thanks.
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Old 21st June 2012, 07:07 PM   #83
ro9397 is offline ro9397  United States
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HiWave BMR 3.5 inch round/square flange $60 now @ Parts Express. Specs lack excursion (earlier prototype included excursion spec). Otherwise specs look great. Sensitivity about +3 dB vs. earlier prototype and also completely smooth mid band vs. big dip in the earlier prototype. Looks like about +/- 2.5 dB 80-15k Hz then -5 dB 15k-20k. What's not to love except for possibly thermal compression and unknown excursion?

At CES 2012 I had first BMR audition: Two prototypes @ HiWave private room, Minx @ Cambridge private room, and Naim's positively magnificent Ovator S-400 in their regular room, absolutely humongous sound stage, overall presentation natural, smooth, effortless, appeared to lack all audible trace of glare, haze, grain, fatigue, and texture...one of the best loudspeakers I've ever heard and I've been hearing the best extant for about 30 years (music, recording, high-end professional...only association to this subject is HiWave made my music instrument accessory).

BMR may be the biggest speaker breakthrough I've ever heard.
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Old 21st June 2012, 07:41 PM   #84
von Ah is offline von Ah  United States
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That driver looks very interesting... I'll wait until the price drops.

HiWave HIBM85C20-4/DD 4" BMR Full-Range Square Speaker 4 Ohm 297-2150

Pics for fun (Hiwave demo, Rega demo, and Naim).
Attached Images
File Type: jpg news_tempus.jpg (14.1 KB, 515 views)
File Type: jpg Rega_RS10.jpg (47.3 KB, 512 views)
File Type: jpg ovators-400_all-views.jpg (13.3 KB, 507 views)

Last edited by von Ah; 21st June 2012 at 07:43 PM.
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Old 21st June 2012, 07:52 PM   #85
ro9397 is offline ro9397  United States
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Quote:
Originally Posted by vaugi View Post
...I'm not sure exactly why some BMR models are on CSS but not Hi-wave (some kind of exclusivity, or marketing exclusivity?). I might ask James Lewis, the CEO, as I'm a shareholder (for transparency I thought I'd mention it too).
A possible simple explanation is CSS paid HW a license fee (as implied at CSS) to employ HW's patented BMR technology (last count HiWave own about 375 international bending wave patents).

CSS owns right to produce, market, and sell CSS products that employ technology licensed and owned by HiWave. HiWave can't sell CSS products. Conversely, CSS can only employ HiWave technology within bounds of the CSS-HiWave contract agreement.
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Old 21st June 2012, 07:54 PM   #86
ro9397 is offline ro9397  United States
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von.ah

Thanks for posting the BMR images. I heard that little clear plexiglass wireless speaker in the HW room! The Ovator sounded just stunning. I'd love to read a Rega review.

You might wait forever for that price drop. Most of that PE BMR cost goes to the Neodymium. China having cornered the Neodymium market, and thus dictating the price, it may remain extremely costly.
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Last edited by ro9397; 21st June 2012 at 07:59 PM.
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Old 21st June 2012, 08:05 PM   #87
von Ah is offline von Ah  United States
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Then I'll wait for the ferrite version. Tang Band style.











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Old 21st June 2012, 08:52 PM   #88
ro9397 is offline ro9397  United States
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Cotswold already has two BMR ferrite 4 inch; I just inquired about pricing and my application.

If I need two BMR to equal acoustic power of one Dynaudio Esotec 17WLQ (active high-pass crossover 2nd order @ 80 Hz), I'm thinking symmetrical vertical array, MTM, both BMR angled inward about 20 degrees toward the central tweeter (either planar or .5-.75 inch dome).

Main speakers active crossed, 2nd order @ 80 Hz + 5-piece Distributed-EQ Bass Reflex Array crossed 4th order about 70 Hz (nice notch for ceiling bounce). Can BMR reach 80 Hz cutoff? If no, what is BMR lowest cutoff? What is audio performance with sub crossed higher than its current 70 Hz to match BMR cutoff above 80 Hz? All unknowns for now.

Passive BMR/tweeter crossover, in-phase: I'm thinking 5-8 kHz, acoustic 1st order.
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Last edited by ro9397; 21st June 2012 at 09:05 PM.
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Old 22nd June 2012, 12:56 AM   #89
von Ah is offline von Ah  United States
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So they do...
Reading comprehension > me.
Logic dictates that we should definitely have a group buy then!
At $6.79 each, I'd imagine it wouldn't be too hard to get 50 tinkerers here interested in a pair at least...
I like your ideas. Maybe someone could decipher a TL for this driver which would reach 80 hz.
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Old 22nd June 2012, 01:25 AM   #90
ro9397 is offline ro9397  United States
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IIRC one CSS ferrite BMR has fS of 87 Hz...unsure what might be its best f3, but suspect with slow roll off rate (sealed) may be OK.
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