SF-18X451
18" Sub-Woofer (Bass), 1500 Watts
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18 inch Low Frequency speaker with minimum power compression and incredible power handling
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Dual Forced Hyperventing System guarantees a very efficient voice coil ventilation
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Best choice for LONG-THROW PUNCH
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Dual Spider designed with Silicon based damping control
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Delivers deep, powerful bass in compact bass reflex as well as horn loaded sub-woofer design
The SF-18X451 features a fibre loaded cone assembly along with a high excursion triple roll, constant geometry surround; this combination provides remarkable strength and an incredibly linear frequency response characteristic
Ideal for: Scoop Bins, conventional reflex cabinets, horn loaded systems and in a wide variety of professional sub-woofer applications
4.5 inch
Voice Coil
97.0 dB
Sensitivity
1500 Watts
Power
8 Ω
Impedance
Additional Info
General Specifications
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| Nominal Diameter | : 18.0 inches |
| Nominal Power Handling | : 1500 Watts |
| Continous Power Handling | : 3000 Watts |
| Voice Coil Size | : 4.5” / 114.3 mm |
| Winding Type | : Inside - Outside |
| Winding Material | : Copper |
| Chassis Material | : Diecast Aluminium |
| Cone Surround | : Triple Roll |
| Spider | : Dual spider |
Technical Specifications
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| Nominal Impedance | : 8 Ω |
| Minimum Impedance | : 6.8 Ω |
| Frequency | : 30 Hz ~ 1 kHz |
| Magnet Size | : 253 * 140 * 30 mm |
| Magnet Type | : Ferrite |
| Magnet Grade | : Y35 |
| Sensitivity | : 97.0 dB |
| Flux Density | : 1.12 T |
Thiele - Small Parameters
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| Resonance Frequency (Fs) | : 30 Hz |
| DC Resistance (Re) | : 5.4 Ω |
| Electrical Factor | : 0.29 Qes |
| Mechanical Factor | : 6.7 Qms |
| Total Factor | : 0.28 Qts |
| Equivalent Cas Air Loaded (Vas) | : 220.0 dm³ (7.77 ft³) |
| Effective Piston Area (Sd) | : 1200.0 cm² (186.0 in²) |
| Voice coil Inductance @ 1kHz (Le) | : 1.38 mH |
| Max. Linear Excursion (Xmax) | : ± 14.0 mm |
| Usable Escues (Xvar) | : ± 15.5 mm |
| Effective Moving Mass (Mms) | : 260.0 g |
| BI Factor (BI) | : 30.5 T x m |
Dimensions & Mounting Information
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| Overall Diameter | : 465 mm (18.3 in) |
| Bolt Circle Diameter | : 445 mm (17.5 in) |
| Baffle Cut-Out Diameter | : 424 mm (16.7 in) |
| Depth | : 212 mm (8.35 in) |
| Volume Occupied | : 6.5 litres (0.26 ft³ ) |
| Net Weight | : 16.9 kg |
| Shipping Weight | : 19.5 kg |
