Eighteen Sound 18NLW4500 18" Extended Low-Frequency Driver — 1600 Watts RMS (1800 W nominal), 3600 W Peak/Continuous, 8 Ohm

Eighteen Sound 18NLW4500 — an 18-inch extended low-frequency loudspeaker engineered for vented, bandpass or horn-loaded enclosures. Built to handle very high power levels while delivering clean, undistorted low-frequency output at extreme SPLs, the driver is recommended to be paired with amplifiers capable of delivering 3600 Watt program power. Key motor and transducer features: a high grade Neo magnet assembly is housed in a motor structure optimized for both thermal and magnetic efficiency. The 18NLW4500 incorporates a large-displacement suspension and a composite-reinforced, straight-ribbed cone combined with Eighteen Sound’s proprietary SDR technology, producing ultra-linear piston behavior and full mechanical control across the driver’s working range. The state-of-the-art 115 mm 4.5 in voice-coil uses Interleaved Sandwich Voice coil (ISV) technology for exceptional thermal stability and durability, yielding a balanced linear motor and an exceptionally high force factor. Electrical specifications: Nominal Impedance: 8 Ohms. Minimum Impedance: 6.1 Ohms. Nominal Power Handling: 1800 W. Continuous Power Handling: 3600 W. Sensitivity: 397.0 dB. Frequency Range: 30 - 1000 Hz. Voice Coil Diameter: 115 mm 4.5 in. Winding Material: copper. Mounting and shipping details: Overall Diameter : 462 mm 18.19 in. Bolt Circle Diameter : 440 mm 17.32 in. Baffle Cutout Diameter : 422.0 mm 16.61 in. Depth : 233 mm 9.17 in. Flange and Gasket Thickness : 23 mm 0.93 in. Net Weight : 12.0 kg 26.46 lb. Shipping Weight : 13.5 kg 29.76 lb.