Polk MM1240

Polk MM1240

$329 $296

12-inch single voice coil subwoofer

SKU: Polk MM1240 Categories: ,

New polymer woofer cones and butyl rubber surrounds will not break down over time and will survive the rigors of harsh automotive environments.

High temperature copper voice coil (51mm) and polyamide former withstands the most rigorous use while maintaining extremely low distortion for bass punch and output.

Nickel plated heavy duty input terminals accommodate speaker wire up to 8 AWG or twisted pairs of 12 AWG.

Carbon composite basket based on the spokes of a wheel is lightweight, will not flex during peaks and looks great! Don’t be afraid to show off the back of your woofer.

Klippel optimized components using a state-of-the-art Klippel distortion analyzer, Polk engineers were able to optimize the woofer’s motor structure, voice coil alignment and suspension for the best possible performance, even at extreme listening levels.

Marine certified Polk MM Series speakers are built tough to withstand the toughest environments so they are perfect for use in boats of all types. That’s why Correct Craft offers Polk speakers in their award-winning Nautiques ski and wakeboarding boats.

Available matching grilles complement the wheel spoke design.

Dual voice coil configuration (MM1240DVC) also available.

All Polk products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk loudspeakers are built to perform for a lifetime.

Driver Complement

Quantity 1
Diameter 12″ (30.48cm)
Type Dynamic Balance woofer with poly-composite cone


Total Frequency Response 22-200Hz
Nominal Impedance 4 ohms
Efficiency 92 dB
Power Handling
Continuous 425 watts
Peak 800 watts
Voice Coil
Driver Diameter 2″ (5.08cm)


Thiele / Small Parameters

Resonant Frequency 30 Hz
Xmax Linear 1 in
LE 3.0 mH
SD 80.6 cu in/520 sq cm
VAS 1.3 cu ft/38 L
QTS .50
QES .63
QMS 3.0


Diameter 11″ (27.94cm)
Driver Mounting Depth
Top Mount 4 5/8″ (11.75cm)
Bottom Mount 5 1/4″ (13.34cm)

Additional Information

Weight 10 kg
Dimensions 40 x 40 x 40 cm