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Mark Audio Alpair 12PW

Mark Audio Alpair 12PW
Mark Audio Alpair 12PW
Mark Audio Alpair 12PW
Mark Audio Alpair 12PW
Mark Audio Alpair 12PW
Mark Audio Alpair 12PW
Mark Audio Alpair 12PW
Mark Audio Alpair 12PW
Tags: alpair , woofer , paper

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)

Speaker Specifications
Nominal Size (mm) 120
Nominal Impedance (Ohms) 6
Power Rating (W) 40
Sensitivity 1W/1M (dB) 88.64
Resonant Frequency (Hz) 38.426
Qts 0.393
Qms 1.44
Qes 0.541
Vas (Litres) 45.292
Re (Ohms) 5.4
Xmax (mm) 8.5
Freq Response Min (hz) 40
Freq Response Max (hz) 10000

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