new fullrange driver from emspeaker

[lrntglls]

Michel Fertin, the former owner of Fertin Audio, known for

its field coil line of driver has introduced a new

12 inch (30cm) - high efficiency (98db) -16 ohm -

fullrange (40hz-15khz) driver.

Match a light cone (34gr) with a strong field coil motor and

you get a very dynamic sound.

A whizzer cone keeps the coherence in the sound:

Michel Fertin prefer a gradual cone break up to do the hf than

the adding a tweeter with all the problems it implies.

He has design an open- baffle and a cabinet plan for the

diy.

http://www.emspeaker.fr/

 

[alain_online]

Nice nice nice !

Salut Gilles,
How do these compare to 20EX ?
"Just" better bass ?
Alain

 

[tinitus]

I thought it was a creation from the hands of his daughter, or at least I liked the idea as much as I like the look of that driver, it doesnt seem to produce much bass energy

 

[BHTX]

as much as I like the look of that driver, it doesnt seem to produce much bass energy

34 Hz Fs with a low Qts of .21 with only 1.5mm Xmax? No wonder.
Of course, if it weren't for this, efficiency probably wouldn't be so high.

 

[planet10]

34 Hz Fs with a low Qts of .21 with only 1.5mm Xmax?

Sounds like horn.

dave

 

[BHTX]

Sounds like horn.

Yep. 🙂

 

[Scottmoose]

Indeed.

Here's an interesting question though... why do so many websites, for the 'English' language option, use the US flag as the icon? 😀

 

[Zen Mod]

Yeah, really..............
</OT> 🙂

even if 75% of my posts are certainly and deliberately OT , I can't agree more .......... this post of yours can't be more OT than it is .........

 

[lrntglls]

Hi, as for the bass; the LB12ex has a variable voltage so

the Qts can be increased by lowering the voltage; on the other

hand you loose a bit in efficiency. The Fertin 20ex has a Qts

of .45 and I would not consider it has being soft bass , quite

the opposite. I listen at 10V so the Qts would be near .4,

acceptable I think.

There's always the option of building a cabinet; but open-baffle

sound is the only option for me.

Field coil (strong motor)+ high efficiency+ light cone; these

are the characteristics of the Fertin sound.

Everything is a compromise; the main thing is to get a great

midrange and compromise with the lf and hf. No fullrange

does everything 100% right but it's the overall sound that

is important: fast- detail- alive and with great tonality.

 

[planet10]

Subthread on Cultural Diversity split off to here

http://www.diyaudio.com/forums/showthread.php?s=&threadid=112644

dave

 

[lrntglls]

emspeaker LB7-

Free shipping to continental US -until oct. 31st.2008

Emspeaker has just introduced a new full range driver the: Emspeaker LB7 - a 7inch - full range driver (40hz-18khz)
-high efficient-low qts = fast driver.


Can be used in a TL cabinet:


Here are the specs:

-Z at 440Hz: 15ohms
-FR: 40Hz
-Qms: 3,770
-Qes: 0,228
-Qts: 0,215
-Mms: 7gr
-Vas: 56L
-BL: 9,66
-Eff: 94,1dB
-Xmax: 3mm
-Acc.factor: 1380
-frequency response: Fx to 18000Hz

 

[Scottmoose]

I like the specs, but with a Qt of about 0.215 & a mass corner of ~350Hz, I'm not sure a TL would be such a good idea TBH if you want to get some bass out of them. Plenty of other options open though of course & you could always Eq them via whatever means you like to allow you to use them in other cab. types.

 

[tinitus]

Or use it with a woofer 😀

 

[Scottmoose]

That too.

 

[tinitus]

Ahhh, just saw this...no whizzer cone 🙂

btw, where do you get your information, as I dont see anything on EMS site 😕

 

[lrntglls]

Yes, I've noticed that also , no whizzer and 18khz.

I need to get this info myself. The emspeaker website

is : www.emspeaker.fr/

The LB7 have just been released so the info is not on the

website; but you can ask Michel Fertin or Katy at the website

or ask questions here. I'll get the answer since I'm in contact

with them. They're have a introductary offer: free shipping but

only the continental USA...

 

[Cal Weldon]

No whizzer but the aluminum dust cap looks to be coupled to the coil so it acts like a pseudo tweeter.

 

[tinitus]

They're have a introductary offer: free shipping but

only the continental USA...

Maybe there will be a discount when buying 4 drivers, like I got on the LB12 😀 may need to ask about the price

 

[lrntglls]

Michel Fertin is on vacation, back Monday, to answer the questions
about the Emspeaker LB12 and LB7.

So Titinus, you bought 4 emspeaker LB12 at a discount.....
Discount there's no better way then asking.....
How did you set them up? Home theater?
I've just finished my basement floor and my LB12 are going
for my home theater; need to buy one more ...hope to get
a discout...at least free shipping even if I'm in Canada.

 

[tinitus]

So Titinus, you bought 4 emspeaker LB12 at a discount.....
Discount there's no better way then asking.....
How did you set them up? Home theater?

No, didnt buy but am now again considering the LB12 as a mid fore a big 3way with 18" woofer and a CD/waveguide
Pricee at the time was 750EUR fore a pair, which I think is OK...BUT, I can get a pair of Faital 12" at half that price, which means that the price of a pair of LB12 will almost get me both 12" and CDs...but the LB12 sure is interesting and wish I knew more details about used materials and build quality

With such drivers I think the major issue is powerhandling as they are intended fore different use than a power-speaker

well, that debate may not belong in fullrange forum....in my youth long ago I was a dedicated fullrange guy, which I am no more....heck, I can also get 12" 99db Beyma fullrange at 90EUR ...if only money wasnt an issue