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
Specifications
- Nominal Diameter: 300 / 12 mm/inch
- Rated Impedance: 8 Ω
- 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 Ω
- 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
- Resonance frequency: 62 Hz
- DC resistance: 5.2Ω
- 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%
- 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