Site Links
Howdy, Stranger!
It looks like you're new here. If you want to get involved, click one of these buttons!
Quick Links
Categories
In this Discussion
(Name Pending), VersaBox project #6, Beyma NMF drivers...
I have not decided on a name yet, but had to post some images of these great looking drivers. Thoughts are currently Monarchs or Plus Ultra for a badge. They sure seem to exude the Plus Ultra Spanish mantra. That is for sure.
The woofer has to be the beefiest 6-6.5" nominal driver I've ever had or used. Frame curve to curve is about 7", but mounting hole center to center is 7.5". By Dayton measurements, even with the pincushion cast frame, I would call this a 7.5" woofer (7" nominal, not 6" as it is labeled). Other features include a 2" VC, double spider, Maltcross and 3 venting paths for a cool operation, 3 shorting rings, 9mm xmax and 43mm p-p xmech, a resonance reducing surround, and a stiff carbon fiber cone.
The tweeter is an Al/Mg dome with a polymer surround in a thick cast waveguided faceplate, bolted to a cast aluminum chamber. Fs is well damped, and Vance says it does not use ferrofluid. The color of the waveguide appears to be finished compared to the other side being natural as it is closer to a pewter shade.
Feast your eyes...
Comments
There is a build note from Beyma, including a modeled xover for both M and S tweeter versions, and a set of cabinet dimensions and such. I've attached it here for reference.
I will be trying my own methods and see where I end up. My thoughts are to suppress the tweeter breakup, and see if a smaller cap flattens response first and go from there. I will likely try to suppress woofer breakup a little more, as that is my usual MO.
InDIYana Event Website
is this a "sponsored by" Beyma type of deal, or did you purchase?
Wow! Those are beefy.
The woofers are $276 each, so not a budget build. Should be an interesting build.
Like me some Al/Mg domes. My naive look at the freq response in that pdf implies serious chest thumper - though know that for their xover, overall speaker design
I bought them.
20% off tweeters at SDC.
$100 winnings, 12% coupon code, and a small lump of cash-back on the CC. I only paid $136 out of pocket for the pair of woofers.
I want to see how close these come to Purifi for the cost. The tweeters I'd been eyeing since in stock, the woofers just happened to also be swingable.
InDIYana Event Website
I've never build with Beyma - but you gotta love having Xmech be 3-4 times Xmax
Me neither, but I'm looking forward to it!
InDIYana Event Website
Excuse my ignorance, why would you find this attractive?
I'm betting Ben gets the port tuning corrected...
That might be a measurement artifact, uncorrected nearfield.
Since you are perusing the Beyma notes; You'll also notice then that the 2 different tweeter builds have different bass Fb tunings according to the system impedance plots. This does not match the FR of the woofer in the 2 different systems, as one should be peaking and one should be flatter, yet, they are the same as shown with the same baffle, xover and woofer. That doesn't add up. It could also be a nearfield bass curve too (JR beat me to it).
My thoughts are that the 47Hz tuning is flatter than shown, and that both system FR show the woofer tuned to 52-55Hz or so. It just so happens my VersaBox is tuned to 47Hz, and most any 6.5" woofer thus far has performed splendidly well in there. I'll find out my preferences.
InDIYana Event Website
Los Campeadores. That is an option Shawn came up with. Not bad.
Inquisitions is funny and not really fitting.
Conquistadors isn't bad.
Where's @Silver1omo when ya need him? 😉
InDIYana Event Website
Los Campeadores. Champions
Los Cuélebre. Mythical powerful immortal and impenetrably scaled dragons
Plus Ultra. Above and beyond, essentially
Conquistadors. Colonizers and conquerors
I like these 4 so far.
InDIYana Event Website
Champions translates to Campeones. Campeador is very especific to a historical figure and it is more related to campaña (campaign), as in military campaign.
Plus Ultra is funny, used as motto of a school in anime (My hero academy).
Missing an e in Conquistadores.
Cuelebre is interesting, just not something that really made it to the Americas.
Inquisidores is a good name, in it's root inquisidor is someone that asks questions and looks for the truth. And
Cortez, Cortez. What a killer.
Go with #1 or #3.
Super Plus Ultra Special Premium Elites
Andalusians?
As in the horse breed, or maybe a person from that region of Spain.
Reading through wikipedia it reports a subset of the horse breed called "Carthusian". But the term Carthusian is a whole other tangent seemingly not necessarily linked to Spain.
Killer Queens ~ BE(y)-MAs (i.e. mother bees)
You are one year too late...https://diy.midwestaudio.club/discussion/2725/killer-queen-build/p1
Anagram maybe?
Actually closer to 51 years...
Campeones
Plus Ultra
I like Inquisidores too. Meaning is two fold.
Cuelebre is still intriguing.
Drew, I looked into bulls, horses, even thought of possibly Matadors as a name, but nothing in that direction seemed to shake out.
I still have other moniker avenues to pursue, I'll keep all of you posted.
InDIYana Event Website
Beyma is in Valencia, so, they use Español and Llengua Valenciana.
With that in mind and the bee talk, you could use:
Abella realenca, Queen bee.
Jagants, Giants.
@Silver1omo, thanks for the insight and the help and suggestions.
InDIYana Event Website