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Musik007 1st October 2015 04:18 PM

Markaudio New Full Range Driver Alpair 5 Gen.2
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The Alpair 5 Generation 2 is a pure Free-to-air Single Suspension Full-Range audio driver. This new
Alpair 5 is more advanced than its first generation version. The new 5 operates only using its all-new
single front suspension.

This design retains designer Mark Fenlon’s classical mechanical engineering approach to reduce
mass and extend long throw operating capacity. Mark, along with Evan Yu and the engineering team
spent several months of research removing mechanical restriction from the ultra thin coil body.

Traditional driver designs use a “spider”, a suspension device located behind the driver’s cone. Bonded to
the coil, it physically restricts a coils ability to transfer mechanical-acoustic signals to the cone. Some
other drivers use damping fluid, springs or other devices, all of which produce losses. This new Alpair
5 design completely removes all these restrictions; Its coil locates cleanly between the driver’s cone
and motor sub-assembly, making the new 5 a pure free-to-air mechanical design.

The accuracy requirement for this new Alpair 5 component design, engineering and detailed assembly
goes well beyond typical commercial audio-driver manufacturing. The front suspension operating
tolerance is measured in milli-newtons. Production Alpair 5 drivers are made to within +/- 2.5Hz @ F
Zero. All production units are then pair matched to with +/- 1Hz @ F Zero.

The result is a detailed balanced sound representation across an ultra wide frequency band for this
class of small driver. A typical box bass-reflex box application with an internal volume of 3 litres can
be port tuned to below 80Hz while the driver retains is high range output up to 25kHz. The outcome
is a very easy to use versatile driver suitable for many smaller applications where higher-end sound
quality is desired from a mini-sized audio driver.

Technical Spec.:
Revc= 3.600 Ohm
Fo= 101.220 Hz
Sd= 28.270 cm²
Vas= 1.324 Ltr
Cms= 1.166m M/N
Mmd= 1.992m Kg
Mms= 2.078 g
BL= 2.522 TM
Qms= 1.493
Qes= 0.755
Qts= 0.502
Levc= 38.886u H
No= 0.181 %
SPLo= 84.593 dB
Xmax= 3.0mm 1 way
Pwr= 15 watts peak Nom.

Price: US$99.8/Pair + shipping cost.

planet10 1st October 2015 06:35 PM

We have had a set of the pre-production proto-types for sometime now. They are very good.

We have built 5 boxes for them -- Pensil, Frugel-Horn Lite, a Baby Labyrinth, uMar-Ken 5.2, and uMar-KenSET (where they currently reside). The 1st 3 designs by Scott, the last 2 by myself. Scott has also specified a basic bass reflex.

The driver is not yet available in North America (Madisound should just now be getting production samples).

I note that the price (1st time i have seen one) from Tony is quite aggressive, hopefully we see that on this side of the Pacific too.


Musik007 2nd October 2015 05:04 PM

Hello Dave,

It's great to know the new box designs for Alpair 5 from you and Scott. I will be happy to see the pics of the boxes if you can provide here.


planet10 6th October 2015 01:40 AM

Here is the uMar-Ken5.2, it is the box we currently have our units in.


toobhed 6th October 2015 01:52 AM

Sweet cabinet, Dave. Bird'seye maple?
…also, looking forward to listening impressions...


toobhed 6th October 2015 01:54 AM

…I should know by now that cab comments should be extended to Chris….

planet10 6th October 2015 01:58 AM

Yes. Advantage of small cabinets, Chris was able tomake use of scrap from another job.


planet10 6th October 2015 01:58 AM

Yes. Advantage of small cabinets, Chris was able tomake use of scrap from another job.


a3cervo 6th October 2015 02:38 AM

Is this the smaller driver in the Viotti One?

planet10 6th October 2015 03:43 AM

The one in the Viotti is not the same, but the same basket & probably the cone.


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