SF-18G402
18" Low Frequency Driver, 1200 Watts
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18″ LF Driver with a Frequency Range of 35 Hz ~ 2000 Hz
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Ventilated voice coil gap for reduced power compression
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Optimized Dual Spider designed with Silicon based Dampening control for low distortion
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Weather-proof treatment on both sides of cone for outdoor usage
4.0 inch
Voice Coil
97.2 dB
Sensitivity
1200 Watts
Power
8 Ω
Impedance
Additional Info
General Specifications
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| Nominal Diameter | : 18.0 inches |
| Nominal Power Handling | : 1200 Watts |
| Continous Power Handling | : 2400 Watts |
| Voice Coil Size | : 4.0” / 99.3 mm |
| Winding Type | : Inside-Outside |
| Winding Material | : Copper |
| Chassis Material | : Diecast Aluminium |
| Cone Surround | : Triple Roll |
| Spider | : Dual Silicon Spider |
Technical Specifications
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| Nominal Impedance | : 8 Ω |
| Minimum Impedance | : 6.3 Ω |
| Frequency | : 35 Hz ~ 2000 Hz |
| Magnet Size | : 220 * 110 * 25 mm |
| Magnet Type | : Ferrite |
| Magnet Grade | : Y35 |
| Sensitivity | : 97.2 dB |
| Flux Density | : 1.2 T |
Thiele - Small Parameters
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| Resonance Frequency (Fs) | : 35 Hz |
| DC Resistance (Re) | : 5.2 Ω |
| Electrical Factor | : 0.4 Qes |
| Mechanical Factor | : 7.3 Qms |
| Total Factor | : 0.38 Qts |
| Equivalent Cas Air Loaded (Vas) | : 220.0 dm³ (7.7 ft³) |
| Effective Piston Area (Sd) | : 1250 cm² (193.75 in²) |
| Voice coil Inductance @ 1kHz (Le) | : 1.7 mH |
| Reference Effiiency (η₀) | : 2.3 % |
| Max. Linear Excursion (Xmax) | : ± 9.0 mm |
| Usable Escues (Xvar) | : ± 11.5 mm |
| Effective Moving Mass (Mms) | : 210.0 g |
| BI Factor (BI) | : 25.8 T x m |
| Efficiency Bandwidth Product (EBP) | : 95 Hz |
Dimensions & Mounting Information
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| Overall Diameter | : 460 mm (18.0 in) |
| Bolt Circle Diameter | : 440 mm (17.3 in) |
| Baffle Cut-Out Diameter | : 422 mm (16.6 in) |
| Depth | : 209 mm (8.2 in) |
| Flange & Gasket Thickness | : 16 mm (0.63 in) |
| Net Weight | : 13.5 kg |
| Shipping Weight | : 15.0 kg |
