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MB12X301 Loudspeaker LF Transducer Woofer 12 Inch Mid Bass Made In China

MID-BASS Professional Low Frequency Transducer 3-inch, fibreglass inside/outside copper voice coil 1000W continuous program power handling 98.0 dB Sensitivity 45 Hz – 2.5 kHz Frequency range Hypervented for minimum power compression M-roll surround and exponential cone geometry


Nominal Diameter 12 / 305  inch / mm 
Rated Impedance  8 ohm
Program Power   1000 Watt
Power handling capacity   500 Watt
Sensitivity   98 dB
Frequency Range  45 - 2500  Hz
Effective Piston Diameter  260 / 10.24  mm / inch
Max Excursion Before Damage (peak to peak)  39 / 1.54  mm / inch
Minimum Impedance 6.7 ohm
Voice Coil Diameter  3.0 / 76  inch / mm 
Voice Coil Material  Copper  
Voice Coil Winding Depth  17 / 0.67  mm / inch
Number of layers  2  
Kind of layer  inside/outside  
Top Plate Thickness  10 / 0.39 mm / inch
Cone Material No pressed pulp  
Cone Design Curved  
Surround Material Polycotton  
Surround Design  M-roll  
Magnets Material  Ceramic    
Overall Diameter 320 / 12.6  mm / inch
Bolt Circle Diameter  293-304 / 11.5-11.9  mm / inch
Bolt Hole Diameter 6.5 / 0.25  mm / inch
Front Mount Baffle Cut-out  282 / 11.1 mm / inch
Rear Mount Baffle Cut-out  284 / 11.18  mm / inch
Depth  130 / 5.13 mm / inch
Volume occupied by the driver  2.2 / 0.09  liters / ft3

An LF (Low Frequency) transducer is an electroacoustic device specifically designed to convert electrical energy into mechanical energy, typically in the form of low-frequency sound waves. These transducers play a critical role across various industries where accurate and reliable low-frequency sound reproduction or measurement is essential.

LF transducers operate on the principle of electromagnetism. They consist of a magnetic core surrounded by a voice coil, which is essentially a wire wound around a lightweight former. When an alternating current flows through the voice coil, it generates a magnetic field that interacts with the static magnetic field of the core. This interaction results in a back-and-forth movement of the coil, thereby transforming electrical energy into mechanical vibrations at low frequencies.

The frequency range for LF transducers often starts from around 20 Hz and can extend down to infrasonic levels. This capability makes them ideal for applications like subwoofers in audio systems, where they are responsible for reproducing the deep bass notes that provide a rich and immersive listening experience.

In industrial contexts, LF transducers find extensive use in non-destructive testing, seismic exploration, underwater sonar systems, and vibration analysis. For instance, they are crucial components in geophysical surveys where they emit low-frequency sound waves that penetrate deep into the earth's crust to detect geological structures and resources. Similarly, in underwater environments, LF transducers serve as both emitters and receivers of acoustic signals, enabling communication, navigation, and detection of submerged objects.

Furthermore, LF transducers are also utilized in haptic feedback technology, allowing users to feel vibrations or movements within devices such as smartphones, gaming controllers, and virtual reality equipment. They contribute significantly to enhancing user experience by adding a tactile dimension to digital interactions.

In summary, LF transducers are versatile and indispensable tools across numerous fields due to their unique ability to effectively generate and sense low-frequency vibrations. They combine advanced physics principles with meticulous engineering to deliver precise, powerful, and dependable performance in applications that span from entertainment to scientific research and industrial processes.