The FL-18LF is an 18 inch diameter (476mm) low frequency transducer designed for very high acoustic output between 40Hz and 120Hz. Like all Flagship series products the FL-18LF features a very high energy product Neodymium based permanent magnet mounted to a rigid but light weight die cast aluminum alloy chassis. This combination makes the FL-18LF ideal for touring sound and portable low frequency public address systems. The light weight also makes this design excellent for flown and permanently suspended designs where load weight must be minimized. The FL-18LF utilizes a large diameter 4 inch (101.6mm) voice coil design that will provide high reliability and reduced power compression. This large voice coil produces very high reliability and power handling and utilizes rectangular conductors in an edge wound configuration. The FL-18LF is ideally suited for sub woofer applications where both low frequency response and efficiency are critical performance parameters. This design is an excellent combination of efficiency and low frequency bandwidth. Ideal applications include touring sub woofers, high impact portable sound subs, and permanently installed flown low frequency enclosures. Computer based parameter optimization techniques have produced a very flexible and light weight but powerful deep bass transducer.

GENERAL SPECIFICATIONS

Nominal Impedance 8 Ω
Power ` 800 Watt (rms)
SPL 1W@1M average sensitivity 98 dB
Frequency Response 40Hz - 120Hz
Dimension Ø x H (cm) 47.6 x 23.2
Net Weight 9.7 kg (21.3 lbs)
Shipping Weight 11.7 kg (25.7 lbs)
Packing Dimension H x W x D (cm) 49.5 x 49.5 x 27.5 (2.4cu.ft)
19.5" x 19.5" x 10.8"

PHYSICAL SPECIFICATIONS

Magnet type Neodymium
Voice Coil Diameter 101.6 mm (4 inch)

THIELE/SMALL PARAMETERS

Resonance Frequency Fs 42 Hz
DC. Resistance Re 6.1. Ω
Coil Inductance Le 0.41 mH
Mechanical Q Factor Qms 9.17
Electrical Q Factor Qes 0.65
Total Q Factor Qts 0.61
BL Product BL 23.17 Tm
Effective Moving Mass Mms 216.88 g
Equivalent Cas Air-Load Vas 132.80 Liters
Effective Piston Area Sd 0.12 Sqm
Half-Space Efficiency Eff 2.23 %
Airgap Height Hag 10.0 mm
Voice Coil Height Hvc 20.0 mm
Voice Coil Overhang Xmax5.0 mm

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