MarkAudio Alpair 12PW 8" Paper Cone Bass-Wide Band Driver

Price: $135.00

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Manufacturer: Markaudio
Product ID : ALPAIR-12PW
Weight: 7.00 lbs
Manufacturer: Markaudio
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Description

Markaudio Alpair 12PW Wide Range (Woofer version of Alpair 12P)

High Efficiency Paper Cone Wide Band - Generation 1 Audio Driver

Link to pdf file specification sheet download

The Alpair 12PW is a audiophile grade paper and glass strand reinforced coned bass-mid driver. Along with its full-range sister 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 reinforced 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 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. 

Alpair 12PW + Alpair 7P Plans

Suggested box Alignment:

45 liters (1.6 cubic feet) with 10% polyester fiberfill.  Use a 3" diameter vent by 7" long for a 3dB down point of 38Hz.  I'm sure there will be other box suggestions online too, try searching for Alpair-12PW at www.diyaudio.com to see what other people are doing with this driver.  There are also some discussion on pairing it with some full range drivers like the Alpair 7P.

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Product Reviews

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Reviewed by Willmac
12/25/2016 - 07:15:16 AM
Great wideband mid bass
Quite an unique midbass driver, being based on a full range unit means it's fairly easy for beginners to design simple crossovers and achieve decent results. The cone profile is very shallow, meaning you cd get away with crossing a little higher than normal for a 7"

Other positive aspects are decent bass, good transients, sensitivity and very clear mids.
Currently using with a viawave ribbon tweet, still voicing the crossover. It's a great combination imo

One thing to watch when designing the x/o is a slight frequency bump around 3khz.