Designed to produce ultra-low frequency response in small enclosures, Eminence's Definimax 4012ULF-8 12" subwoofer features a cast aluminum frame, 109 oz. magnet, and large 4" long throw voice coil. With Core Periphery Ventilation and a Kapton voice coil former, this driver can handle 1200 watts RMS with minimal power compression. Also, the water resistant paper cone and cloth surround make this an ideal driver for use in less than favorable environments.
Extensive venting for the 4" voice coil improves power handling
Long throw design capable of 6.2 mm Xmax for powerful low frequency output
Cast aluminum frame provides solid support for the 109 oz. magnet
Designed for optimum performance in small vented cabinets
Power Handling (RMS)1,200 Watts
Power Handling (max)2400 Watts
Frequency Response37 to 200 Hz
Sensitivity90.7 dB 1W/1m
Voice Coil Diameter4"
Magnet Weight109 oz.
Resonant Frequency (Fs)40 Hz
DC Resistance (Re)6.2 ohms
Voice Coil Inductance (Le)4.32 mH
Mechanical Q (Qms)12.13
Electromagnetic Q (Qes)0.32
Total Q (Qts)0.31
Compliance Equivalent Volume (Vas)1.46 ft.Â³
Mechanical Compliance of Suspension (Cms)0.1 mm/N
BL Product (BL)27.38 Tm
Diaphragm Mass Inc. Airload (Mms)153g
Maximum Linear Excursion (Xmax)6.7 mm
Materials of Construction
Cone MaterialCoated Paper
Voice Coil Wire MaterialCopper
Voice Coil FormerKaptonÂ® / Polyimide
Basket / Frame MaterialCast Aluminum
Overall Outside Diameter12.38"
Baffle Cutout Diameter11.07"
Bolt Circle Diameter11.69"
# Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)