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Very high efficiency and extended linearity are special features of this mid-bass transducer. Very efficient heat dissipation is ensured by a radiator that is part of the basket design. The aluminum voice coil offer a properly aligned Q factor and a very high sensitivity. A specially designed Shallow Triple-roll surround guarantee a very low midrange distortion. Fiberglass former voice coil, polycotton suspensions and treated cone provide the very high power handling.
Features 4-inch, fiberglass former, edgewound aluminum voice coil 700W continuous program power handling 101 dB Sensitivity 60 Hz – 2 kHz Frequency range Shaped Shallow Triple-roll damped surround Inverted dust cap
General Specifications Nominal Diameter: 300 / 12 mm/inch Rated Impedance: 8 Ohm Program Power: 700 W AES Power handling capacity: 350 W AES Sensitivity: 101 dB Frequency Range: 60 Hz ÷ 2000 Hz Effective Piston Diameter: 260 / 10.2 mm/inch Max Excursion Before Damage (peak to peak): 40 / 1.6 mm/inch Minimum Impedance: 7.2 Ohm Voice Coil Diameter: 100 / 4 mm/inch Voice Coil Material: Aluminum Voice Coil Winding Depth: 12 / 0.5 mm/inch Number of layers: 1 Kind of layer: outside Top Plate Thickness: 10 / 0.4 mm/inch Cone Material: No pressed pulp Cone Design: Curved Surround Material: Polycotton Surround Design: Triple roll
Thiele/Small Parameters Resonance frequency: 62 Hz DC resistance: 5.2 Ohm Mechanical factor: 4.1 Electrical factor: 0.29 Total factor: 0.27 BL Factor: 18.8 T · m Effective Moving Mass: 50 g Equivalent Cas air load: 52 liters Effettive piston area: 0.053 m² Max. linear excursion (mathematical): 3.5 mm Voice - coil inductance @ 1kHz: 1.25 mH Half-space efficiency: 4.12%
Mounting information Overall Diameter: 320 / 12.6 mm/inch Bolt Circle Diameter: 296-304 / 11.7-12 mm/inch Bolt Hole Diameter: 7 / 0.3 mm/inch Front Mount Baffle Cut-out: 286 / 11.3 mm/inch Rear Mount Baffle Cut-out: 284 / 11.2 mm/inch Depth: 146 / 5.7 mm/inch Volume occupied by the driver: 2.9 / 0.10 liters/ft³ Net Weight: 11.5 / 25.3 kg/lbs
RCF L12L750, Mid-Bass 12", 350 Watt RMS / 8 Ohm
