Mark Audio Alpair 12PW

The Alpair 12PW is a audiophile grade paper and glass strand re-enforced coned bass-mid
driver. Along with its Full-Range sisters drivers, 6P,10P and 12P, the Alpair 12PW is designed
for the Serious music listener. The 12PW’s relatively flat response is designed to deliver a
neutral sound. The mid-high range gradually falls away above 10kHz.

The development of this driver follows its Full-Range sister unit, the Alpair 12P. Both drivers are
Semi-Free-To-Air designs, relying solely on their rear suspensions for mechanical operation. The
Alpair 12PW has a re-enforced rear suspension and a new coil to enable handling of typical
audiophile low frequency loads (not constant low frequency loads).

The 12PW has a long mechanical throw, limited by its Arrestor to 8.5mm (1 way). This driver is a
low-mass design, its power-train has a moving mass of 11.7 grams yet delivers a Vas of 45 litres
with a total Q of 0.39, making it ideal for larger scale purist box designs.!

An all-new computer controlled bonding process is deployed on this driver, delivering ultra tight
tolerances in critical parts of the 12PW’s power-train assembly. !!

The 12PW is primarily designed to be partnered with the Alpair 7P yet will also be a excellent
partner for many tweeters. The marriage between 7P and 12PW promises much in the way of
deep rich bass and fine mid-high range detail.

Revc= 5.400 Ohm
Fo= 38.426 Hz
Sd= 147.411 cm
Vas= 45.292 Ltr
Cms= 1.468m M/N
Mmd= 10.658 g
Mms= 11.687 g
BL= 5.308 TM
Qms= 1.440
Qes= 0.541
Qts= 0.393
Levc= 49.302u H
No= 0.460 %
SPLo= 88.641 dB
Pwr=40 watts Nom.
X max= 8.5mm (1 way)