Fane Colossus 12MB 450w 8 ohm High power bass and mid bass driver
The Colossus 12MB is intended for use as a very high output bass mid driver in two way ported enclosures and also as a bass driver in multiway systems. The unit features a 3 inch voice coil driven by a non inductive motor system which dramatically reduces third harmonic and intermodulation distortion. The cone membrane, manufactured from Polycellulose, is much stronger and more durable than conventional paper pulp alternatives. This allows the driver to combine high sensitivity with the structural integrity required to produce undistorted low frequencies at high output levels. The mechanical and electrical properties of the unit have been carefully optimised to allow extended low frequency output up to it's rated power handling of 450 Watts (A.E.S continuous). Heat is dissipated from the ultra light aluminium voice coil by a composite glass fibre and black anodised aluminium former. This assists in yielding outstanding power handling from a 3 inch coil, with peak power handling in excess of 1800 Watts! The driver exhibits an average sensitivity of 98 dB and is best used in ported enclosures of 25 to 80 litres.
Mounting information
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Overall Diameter 13 inch/330.2 mm
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Width Across Flats 12.19 inch/309.5 mm
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Flange Thickness 0.305 inch/7.8 mm
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Baffle Hole Diameter, Front Mount 11.03 inch/281 mm
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Baffle Hole Diameter, Rear Mount 10.13 inch/257 mm
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Gasket Supplied Front & Rear
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Fixing Holes 4 x 0.218 inch diam on 12.5 PCD
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4 x 5.5 mm diam on 317.5 PCD
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Depth 5.39 inch/137 mm
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Weight 17.1 lb/7.8 kg
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Recommended Enclosure Volume 0.88-2.83 cu ft/25-80 litres
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Volume Displaced by Driver 0.10 cu ft/2.8 litres
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Shipping Weight 20.2 lb/9.2 kg
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Packing Carton Dimensions 340 x 340 x 222 mm
Electro mechanical specifications
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Nominal Chassis Diameter 12 inch/305 mm
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Impedance 8 ohms
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Power Handling 450 (A.E.S.)
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Maximum Output Continuous/Peak 121/127 dB
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Power Compression at Rated Power 4 dB
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Usable Frequency Range 40 Hz-3.5 kHz
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Average Sensitivity 98 dB 1W/1m
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Fs 55 Hz
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Moving Mass inc. Air Load 59 grams
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BL Product (Newtons/amp) 18.3
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Minimum Impedance (Zmin) 7 �
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Effective Piston Diameter 10.24 inch/260 mm
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Flux Density 1.16 Tesla
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Magnetic Gap Depth 0.35 inch/9 mm
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Coil Winding Height 0.70 inch/18 mm
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Voice Coil Length 72 feet/21.8 m
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Magnet Weight 93 oz/2.65 kg
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Maximum Cone Displacement 0.70 inch/18 mm
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Peak Displacement Volume of Cone, Vd 0.58 litres
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Voice Coil Diameter 3.0 inch/77 mm
Contruction materials
- Coil Former Fibreglass and Black Anodised Aluminium
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Voice Coil Material Aluminium
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Magnet Ferrite
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Chassis Die Cast Aluminium
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Cone Curvilinear Polycellulose
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Surround/Edge Termination Polyvinyl Damped Multi Roll Linen
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Dust Dome Solid Paper
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Connectors Push Button Spring Terminals
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Polarity Positive voltage at red terminal causes forward motion of cone
Thiele-Small Parameters
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Resonant Frequency fs 55 Hz
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D.C Resistance Re 5.5 �
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Qts 0.286
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Qes 0.333
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Qms 2.05
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Mms (grams) 59
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Cms (microns per Newton) 142
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BL Product 18.3 Tesla metres
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Vas 56 litres
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Reference Efficiency %u2039o 2.71 %
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Piston Area Sd 0.053 m2
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Xmax 5.5 mm
A.E.S. power handling test. Pink noise bandpass filtered at 12 dB per octave
with cutoff frequencies of 30 Hz and 300 Hz. Driver mounted in free air, test signal
applied at rated power for two hours.
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