L18P400 18" Pro Woofer — 2000W Program / 1000W AES, 97.5 dB Sensitivity, 25 Hz–1 kHz

The L18P400 is an 18-inch professional low-frequency transducer engineered for very high power handling, long linear excursion and tight control. Its construction and cooling design make it suited to bass-reflex and horn-loaded systems as well as demanding studio monitoring subwoofer applications where low distortion and deep extension are required. Key design features: - 4-in ch, fiberglass inside/outside copper voice coil construction for durability and heat resistance - Fibre-loaded straight cone with corrugated geometry and triple-roll polycotton surround for controlled excursion - Dual spider arrangement with silicon-based damping for stable suspension behavior - Aluminum demodulation ring and forced-air ventilation together with a 15mm top plate to minimize power compression Electrical & power ratings: - Rated Impedance: 8 Ohms - Program Power: 2000 W - AES Power handling capacity: 1000 W - Sensitivity: 97.5 dB - Frequency Range: 25 Hz to 1000 Hz Mechanical & driver details: - Nominal Diameter: 460 / 18 mm/inch - Effective Piston Diameter: 395 / 15.6 mm/inch - Max Excursion Before Damage (peak to peak): 50 / 2.0 mm/inch - Max. linear excursion (mathematical): 8.8 mm - Voice Coil Diameter: 100 / 4 mm/inch - Voice Coil Material: Copper - Voice Coil Winding Depth: 25 / 1.0 mm/inch - Number of layers: 2 (inside / outside) - Top Plate Thickness: 15 / 0.6 mm/inch - Cone Material: No pressed pulp - Cone Design: Straight - Surround Material: Polycotton - Surround Design: Triple roll Thiele/Small and performance data: - Resonance frequency: 29 Hz - DC resistance: 5.1 Ohms - Mechanical factor: 7.6 - Electrical factor: 0.29 - Total factor: 0.28 - BL Factor: 24.6 T - m - Effective Moving Mass: 200 g - Equivalent Cas air load: 340 liters - Effettive piston area: 0.122 m-Squared - Voice-coil inductance at 1kHz: 2.5 mH - Half-space efficiency: 2.63% Mounting & dimensions: - Overall Diameter: 465 / 18.3 mm/inch - Bolt Circle Diameter: 442-447 / 17.4-17.6 mm/inch - Bolt Hole Diameter: 6.5 / 0.25 mm/inch - Front Mount Baffle Cut-out: 424 / 16.7 mm/inch - Rear Mount Baffle Cut-out: 424 / 16.7 mm/inch - Depth: 205 / 8.1 mm/inch - Volume occupied by the driver: 6.0 / 0.21 liters/ft3 Weights & shipping: - Net Weight: 13.3 / 29.3 kg/lbs - Shipping weight: 14.3 / 31.5 kg/lbs