(+39) 0522 1861800 info@eighteensound.it | Login Home ABOUT US STAFF WORK WITH US Products TECHNOLOGIES Enclosure Design Lyceum News PRESS ROOM NEWSLETTER DISTRIBUTORS Contacts SERVICE Detail Home / Products Articles Detail By Technologies Interleaved Sandwich Coil 18LW2500 Extended LF Ferrite Transducer Key Features 95 dB SPL 1W / 1m average sensitivity 100 mm (4 in) Interleaved Sandwich Voice coil (ISV) 3200W program power handling 70 mm (2,76 in) peak to peak excursion Ultra linear dual magnet motor design Composite reinforced straight ribbed cone Optimized high grade ferrite magnet assembly Recommended for subwoofer usage in compact vented enclosures Datasheet Back Description The 18LW2500 is a 18" (466 mm) extended low frequency loudspeaker, designed for use in vented 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 3400 Watt program power. The 18LW2500 features a unique motor featuring a high grade ferrit magnet assembly in a structure optimized for thermal and magnetic efficiency. 18LW2500 features include a large displacement suspension system which, in conjunction with a composite reinforced, straight ribbed cone and the Eighteen Sound proprietary Double Silicon Spider (DSS) technology, 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. General Specifications Nominal Diameter 462 mm (18 in) Rated Impedance 8 Ohm AES Power 1600 W Program Power 3200 W Peak Power 7200 W Sensitivity 95 dB Frequency Range 30 Hz - 1000 Hz Power Compression @-10dB 0,6 dB Power Compression @-3dB 2,2 dB Power Compression @Full Power 3,3 dB Max Recomm. Frequency 250 Hz Recomm. Enclosure Volume 160-350 lt (4.59 - 12.37 cuft) Minimum Impedance 6,1 @ 25° Max Peak To Peak Excursion 70 mm (2,76 in) Voice Coil Diameter 100 mm (4 in) Voice Coil winding material Copper wire Suspension Triple roll, Heavy Polycotton Cone Curved ribbed fiber loaded cellulose Thiele Small Parameters Fs 34 Hz Re 4,9 Ohm Sd 0,113 sq.m (175,15 sq.in) Qms 22 Qes 0,34 Qts 0,33 Vas 135 lt. (4.76 cu.ft) Mms 290 gr. (0,64 lb) BL 30 Tm Linear Mathematical Xmax ±14 mm (±0,55 in) Le (1kHz) 2,87 mH Ref. Efficiency 1W@1m (half space) 93,8 dB Mounting information Overall diameter 462 mm (18,18 in) N. of mounting holes and bolt 8 Mounting holes diameter 8,5 mm (0,33 in) Bolt circle diameter 440 mm (17,32 in) Front mount baffle cutout ø 416 mm (16,38 in) Rear mount baffle cutout ø 422 mm (16,61 in) Total depth 234 mm (9,21 in) Flange and gasket thickness 26 mm (1,02 in) Net weight 16,7 kg (36,8 lb) Shipping weight 18,2 kg (40,1 lb) Packaging Dimensions 18,2 kg (40,1 lb) Models Model Code Info 0221882400 0221882400 8 Ohm Category By Category LF Transducers - Neodymium LF Transducers - Ferrite HF Drivers - Neodymium HF Drivers - Ferrite Coaxials Horns Line Array Waveguides Crossover By Applications Extended Low Frequency Low Frequency Midbass Midrange Compression Drivers Constant Coverage Horns Line Array Sources Coaxials By Technologies Neodymium Magnet Interleaved Sandwich Coil Edge Wound Al Voice Coil Double Silicon Spider Single Demodulating Ring Double Demodulating Ring Active Impedance Control Proprietary Phase Plug Design True Piston Motion Active Cooling System Elliptical Shape Spherical Waveguide Triple Silicon Spider Tetracoil Legacy products for reference LF Transducers - Neodymium LF Transducers - Ferrite HF Drivers - Neodymium HF Drivers - Ferrite Coaxials Get in touch Eighteen Sound S.r.l. Via Botticelli 8 42124 Mancasale (RE) - Italy Ph. +39 0522 1861800 Fax +39 0522 1861801 Subscribe Newsletter Stay informed about our products and our technological innovations. Please enter your e-mail address and subscribe to our newsletter * Required Follow us You Tube Facebook Memberships AES member NAMM member Privacy Statement | Login Scroll