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/
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/
Attachments
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

tinitus said: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.
BHTX said:34 Hz Fs with a low Qts of .21 with only 1.5mm Xmax?
Sounds like horn.
dave
Indeed.
Here's an interesting question though... why do so many websites, for the 'English' language option, use the US flag as the icon? 😀
Here's an interesting question though... why do so many websites, for the 'English' language option, use the US flag as the icon? 😀
BHTX said: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 .........

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.
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.
Subthread on Cultural Diversity split off to here
http://www.diyaudio.com/forums/showthread.php?s=&threadid=112644
dave

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

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
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
Attachments
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.
Ahhh, just saw this...no whizzer cone 🙂
btw, where do you get your information, as I dont see anything on EMS site 😕
btw, where do you get your information, as I dont see anything on EMS site 😕
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...
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...
No whizzer but the aluminum dust cap looks to be coupled to the coil so it acts like a pseudo tweeter.
lrntglls said:
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
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.
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.
lrntglls said:
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

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

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