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Beryllium Tweets

who is buying into the ~~hype~~?
 I mean new is not always better. I think this Beryllium  is all hype. ~~ IF indeed  this tweet was superior to past proven and tried legends,,why are there not videos on Youtube with the ~~goods~~ the proof is in the listening So  far there are no  uploads with a  compare to old Legends. 
I am staying with my Millenium. 
I've read somewhere the Be tweet sounds rather plastic-ity on top end. 
btw we should mention the Be tweet is actually a  mid-tweet which is the best design for a  2 way. 
If someone can make a series of vids comparing the new kidontheblock Beryllium, I ain;t buying in and have this gut feeling its all hyped. 
skaneoil buster here. 
mozartfan

Showing 1 response by eisen0169

eisen0169
51 posts
 
Regarding the Yamaha NS-5000, here are some "specs" for zylon vs. beryllium.  Yamaha says the "sound velocity" is comparable to beryllium.  Keep in mind the same material is used for all 3 drivers and Yamaha uses a big dome midrange, not a cone.  Go looking for another loudspeaker with those two parameters.  I couldn't find one. 

A good test for this speaker, or any speker, is the opening of the movie Bladerunner 2049, which is on the soundtrack.  The bass is visceral.  The 12" woofers really move with no distortion I could discern.  They go really low.

From AV Hub Australia June 30, 2016

"As you’ll read in our interview with Koji Okazaki, Yamaha’s audio division has long harboured a desire to revisit the elements that made the NS-1000 and its pro version such a success. But not, we should note immediately, the element of beryllium. Instead Yamaha claims to have matched and possibly gone beyond this awkward substance in “adopting a new development diaphragm with a speed of sound comparable to beryllium in all units” — quite the claim, given that beryllium already has twice the sound propagation velocity of titanium or magnesium. The mystery material is a synthetic polymer called ‘Zylon’, which is manufactured in two varieties, Zylon-AS and Zylon-HM. It is used by NASA and in Formula One cars, and according to manufacturer Toyobo’s spec sheet for Zylon, it is indeed lighter and stronger than beryllium, its density 1.55g/cm3 compared with 1.8g/cm3 for beryllium, and its tensile strength 5.8 gigapascals compared with only 0.24 gigapascals for beryllium, and surpassing even carbon fibre at 3.5GPa. Zylon is also amazingly flame resistant, according to Toyobo, hopefully something prospective NS-5000 owners will never need to discover."

"The zylon fibers are coated with Monel using vapor deposition.   The reason we chose the new material is that it helps to express the small nuances of wind instruments such as a flute and clarinet that fibre materials can’t do. In addition, it prevents Zylon from degrading by ultraviolet rays."

When the speakers are reviewed in the USA, as I expect they will be, I'm not sure how much of all the detail behind the technology such as this will make it into any story, because there's a lot.  Yamaha's R&D on zylon diaphragms and the speaker's development began 8 years before the speakers made their debut in late 2015 or early 2016.


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