Markaudio Alpair-12PW 8" Paper Woofer

Price for 1 piece

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Product description

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.

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Highlights

Gradual roll-off @10kHz

Lightweight paper cone

Longthrow suspension

Flat response

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Product details

Markaudio Alpair-12PW 8” Paper Woofer

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.

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Specifications

• Article number Alpair-12PW
• Woofer Series Alpair Series
• Woofer Type Midwoofer
• Nominal Diameter 8"
• Power Handling (RMS) 40 Watts
• Impedance (Z) 8 ohms
• Sensitivity 87.5 dB 2.83V/1m
• Frequency Response 30 to 12,000 Hz
• Voice Coil Diameter 1"
• DC Resistance (Re) 5.4 ohms
• Voice Coil Inductance (Le) 0.49 mH
• Resonant Frequency (Fs) 73.4 Hz
• Mechanical Q (Qms) 1.44
• Electromagnetic Q (Qes) 0.54
• Total Q (Qts) 0.39
• Diaphragm Mass Inc. Airload (Mms) 11.69 g
• Surface Area of Cone (Sd) 147.4 cm²
• BL Product (BL) 5.31 Tm
• Compliance Equivalent Volume (Vas) 1.59 ft.³
• Maximum Linear Excursion (Xmax) 8.5 mm
• Cone / Diaphragm Material Paper
• Surround Material Rubber
• Basket / Frame Material Glass-Fibre
• Magnet Material Ferrite
• Overall Outside Diameter 8.15"
• Overall Depth 3.78"
• Baffle Cutout Diameter 6.61"
• Bolt Circle Diameter 7.32"
• # Mounting Holes 4