21-in extended low frequency loudspeaker, designed for use in vented enclosures and infra subwoofer

97 dB SPL 1W / 1m average sensitivity. 100 mm 4 in Interleaved Sandwich Voice coil ISV. 3200W program power handling. 60 mm 2,76 in peak to peak excursion. Ultra linear dual magnet motor design. Single Demodulating Ring SDR for lower distortion. Composite reinforced straight ribbed cone. Optimized high grade ferrite magnet assembly. Recommended for subwoofer usage in compact vented enclosures Nominal Diameter: 533 mm in. Nominal Impedance: 8 Ohms. Minimum Impedance: 6.6 Ohms. Nominal Power Handling: 1600 W. Continuous Power Handling: 3200 W. Sensitivity: 397.0 dB. Frequency Range: 35 - 1400 Hz. Voice Coil Diameter: 100 mm 4.0 inThe 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 3600 Watt program power. The 21LW2600 features a unique motor featuring a high grade ferrit magnet assembly in a structure optimized for thermal and magnetic efficiency. 21LW2600 features include a large displacement suspension system which, in conjunction with a composite reinforced, straight ribbed cone allows an ultra-linear piston action and provides full mechanical control across the entire working range. The 100mm 4 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.