The 15NLW4500 is a 15" extended low frequency loudspeaker, designed for use in vented, bandpass or even horn loaded ì enclosures. The loudspeaker is designed to withstand high power levels without damage while providing clean and undistorted LF reproduction at a very high SPL. For optimum results we recommend amplifiers able to deliver 3000 Watt program power. The 15NLW4500 features a unique motor featuring a high grade Neo magnet assembly in a structure optimized for thermal and magnetic efficiency. 15NLW4500 features include a large displacement suspension system which, in conjunction with a composite reinforced, straight ribbed cone and the Eighteen Sound proprietary SDR technology, allows an undiostorted ultra-linear piston action and provides full mechanical control across the entire working range. The 115mm (4.5 in) state-of-the-art voice-coil utilizing Interleaved Sandwich Voice coil (ISV) technology, provides high levels of thermal stability and durability. The ISV technology achieves a balanced linear motor unit exerting an exceptionally high force factor.
Mounting and Shipping Info
Nominal Impedance8 Ω
Minimum Impedance6.7 Ω
Nominal Power Handling11500 W
Continuous Power Handling23000 W
Frequency Range40 - 1000 Hz
Voice Coil Diameter115 mm (4.53 in)
Recommended Enclosure50.0 dm3 (1.77 ft3)
Recommended Tuning45 Hz
Resonance Frequency35 Hz
Vas111.0 dm3 (3.92 ft3)
Sd881.0 cm2 (136.56 in2)
Maximum Excursion12.0 mm
Overall Diameter393 mm (15.47 in)
Bolt Circle Diameter371 mm (14.61 in)
Baffle Cutout Diameter356.0 mm (14.02 in)
Depth199 mm (7.83 in)
Flange and Gasket Thickness15 mm (0.61 in)
Net Weight11.4 kg (25.13 lb)
Shipping Weight12.6 kg (27.78 lb)
2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minimum impedance. Loudspeaker in free air.
Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.