Transcript
High efficiency 12” mid-bass. Very high sensitivity, excellent linearity and very low distortion.
MID-BASS L12/854K Professional Low Frequency Transducer
PART NUMBER 11140030
Features
Applications
2,5-inch, Kapton former, copper voice coil 700 Watt continuous program power handling 98 dB Sensitivity 50 Hz - 3 kHz Frequency range M-roll surround and exponential cone geometry
A very light moving mass, a curve response linear above 3 kHz makes the L12/854K a very good solution for high quality two or three way system. Very easy to crossover and ideal in conjunction to small size 1 inch compression drivers.
50
20 68
3000
100
1.000
10.000
20.000
8 holes ø 7 mm to 45° on ø 296 mm and on ø 304 mm
General Specifications
ø 320 mm 12 mm
Nominal Diameter Rated Impedance Program Power 1 Power handling capacity 2 Sensitivity 3 Frequency Range Effective Piston Diameter Max Excursion Before Damage (peak to peak) Minimum Impedance Voice Coil Diameter Voice Coil Material Voice Coil Winding Depth Number of layers Kind of layer Top Plate Thickness Cone Material Cone Design Surround Material Surround Design
320/12 8 700 350 98 50 - 3000 260/10.2 30/1.2 6.3 64/2.5 Copper 10/0.4 2 outside 8/0.3 No pressed pulp Curved Polycotton M - roll
mm/inch ohm Watts Watts dB Hz mm/inch mm/inch ohm mm/inch
67 5.0 3.4 0.43 0.38 13.7 38 58 0.053 3.0 1.1 3.91
Hz ohm
T·m gr liters m2 mm mH %
320/12.6 296-304/11.7-12 7/0.3 286/11.3 284/11.2 137/5.4 2.2/0.08
mm/inch mm/inch mm/inch mm/inch mm/inch mm/inch liters/ft3
5.4/11.9 5.9/13
Kg/Lbs Kg/Lbs
mm/inch
mm/inch
132 mm
Thiele - Small Parameters 4 Resonance frequency DC resistance Mechanical factor Electrical factor Total factor BL Factor Effective Moving Mass Equivalent Cas air load Effettive piston area Max. linear excursion (mathematical) 5 Voice - coil inductance @ 1KHz Half-space efficiency
ø 156 mm ø 285 mm 110
SPL, 1w/1m (dB)
100
90
80
20
100
1.000
10.000
20.000
Frequency (Hz)
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.
Impedance (ohms)
316 100
Fs Re Qms Qes Qts BL Mms Vas Sd Xmax Le1K Eff
Mounting Information Overall Diameter Bolt Circle Diameter Bolt Hole Diameter Front Mount Baffle Cut-out Rear Mount Baffle Cut-out Depth Volume occupied by the driver 6
10
Shipping Information 20
100
1.000 Frequency (Hz)
Impedance magnitude curve measured in free air.
10.000
20.000
Net Weight Shipping Weight
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 200-2 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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