The MB12N351 is designed to provide an excellent frequency response linearity

MID-BASS with very low distortion. A very strong neodymium magnetic structure guarantee
dynamic and precision, a new and unique 3,5” voice coil design provides a very
MB12N351
Professional Low Frequency Transducer
high power handling, especially recommended in comparison to a standard 3”
voice coil. The unique Dual-forced air venting system guarantee a very efficient
voice coil ventilation to minimize the power compression and provide higher power
handling.
PART NUMBER 11100026

Features Applications
3,5-inch, inside-outside copper voice coil The MB12N351 is ideal for use in applications where is required a very high
1300 Watt continuous program power handling efficiency and linearity with high power handling. It’s especially recommended for
99 dB Sensitivity high powered multi-way system.
45 Hz - 3 kHz Frequency range
Dual-forced air ventilation for minimum power
compression
Single spider design with silicon based damping
control

45 3000

20 100 1.000 10.000 20.000

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8 holes ø 6,5 mm to 45°
on ø 293,5 mm and on ø 304 mm General Specifications
Nominal Diameter 300/12 mm/inch
Rated Impedance 8 ohm
Program Power 1 1300 Watts
Power handling capacity 2 650 Watts
Sensitivity 3 99 dB
Frequency Range 45 - 3000 Hz
Effective Piston Diameter 260/10.2 mm/inch
Max Excursion Before Damage (peak to peak) 39/1.5 mm/inch
Minimum Impedance 7.0 ohm
Voice Coil Diameter 87/3.4 mm/inch
Voice Coil Material Copper
Voice Coil Winding Depth 16.5/0.65 mm/inch
Number of layers 2
Kind of layer inside/outside
ø 320 mm Top Plate Thickness 11/0.43 mm/inch
Cone Material No pressed pulp
13 mm Cone Design Curved
Surround Material Polycotton
Surround Design M - roll
138 mm

Thiele - Small Parameters 4

Resonance frequency Fs 55 Hz
DC resistance Re 5.6 ohm
ø 118 mm
Mechanical factor Qms 4.5
ø 280 mm Electrical factor Qes 0.21
110
Total factor Qts 0.20
BL Factor BL 22.5 T·m
100 Effective Moving Mass Mms 54 gr
SPL, 1w/1m (dB)

Equivalent Cas air load Vas 61 liters

90 Effettive piston area Sd 0.053 m2
Max. linear excursion (mathematical) 5 Xmax 5.5 mm
80 Voice - coil inductance @ 1KHz Le1K 1.65 mH
Half-space efficiency Eff 4.66 %
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Frequency (Hz)
Mounting Information
Frequency response curve of the loudspeaker taken in a hemispherical, free field environment and mounted in a
closed box with an internal volume of 600 litres (21,2 cu.ft) enclosing the rear of the driver.
Overall Diameter 320/12.6 mm/inch
Bolt Circle Diameter 293-304/11.5-12 mm/inch
316 Bolt Hole Diameter 6.5/0.3 mm/inch
Front Mount Baffle Cut-out 282/11.1 mm/inch
100 Rear Mount Baffle Cut-out 284/11.2 mm/inch
Impedance (ohms)

Depth 138/5.4 mm/inch

Volume occupied by the driver 6 2.2/0.077 liters/ft3
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Shipping Information
20 100 1.000 10.000 20.000 Net Weight 4.4/9.7 Kg/Lbs
Frequency (Hz)
Shipping Weight 5.2/11.4 Kg/Lbs
Impedance magnitude curve measured in free air.

Notes to Specifications
1 Program Power is defined as 3 dB greater than AES power. - 2 AES standard. - 3 Sensitivity measurement is based on a 500-2,5 kHz pink noise signal with input power of 2.83V @ 8 Ohms. - 4 Thiele-Small parameters are measured after a
2 hour warm up period running the loudspeaker at full power handling capacity. - 5 The maximum linear excursion is calculated as: (Hvc - Hg)/2 + Hg/4 where Hvc is the voice coil depth and Hg the gap depth. - 6 Calculated for front mounting
on 18 mm thick board.

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