The AM Series features an 18 inch (460mm) diameter loudspeaker designed for extended deep bass and sub woofer applications. The design parameters of the AM-18ELF produce a transducer with a rated bandwidth of 30Hz to 100Hz. Extended voice coil winding length , lower free air resonance and a suspension system capable of increased displacement produce a loudspeaker capable of clean and tight response down to 30Hz. The AM-18ELF utilizes a Ferrite based permanent magnetic design and a medium format 3 inch (76.2mm) voice coil to generate an efficiency bandwidth product that provides a perfect combination of low frequency extension and acoustic output. The AM-18ELF is ideal for sub bass effects and for any application where ultra low frequency response is specified. The AM-18ELF offers all of the power handling and system reliability required for both portable ultra low frequency effects as well as for installed systems such as dance clubs.Deep sub bass response requires transducers designed for this specific application. The AM-18ELF has been optimized for very low frequency operation through the use of advanced computer based design and modeling software.

GENERAL SPECIFICATIONS

Nominal Impedance                8 Ω

Power                                      600 Watt (rms)

SPL 1W@1M average sensitivity 97 dB

Frequency Response              30Hz - 100Hz

Dimension Ø x H (cm)            46.1 x 19.4

Net Weight                              9 kg (19.8 lbs)

Shipping Weight                     11 kg (24.2 lbs)

Packing Dimension H x W x D (cm) 49.5 x 49.5 x 24.5 (2.1cu.ft)

19.5" x 19.5" x 9.6"

PHYSICAL SPECIFICATIONS

Magnet type                           Ferrite

Voice Coil Diameter                76.2 mm (3 inch)

THIELE/SMALL PARAMETERS

Resonance Frequency Fs        26 Hz

DC. Resistance Re                  5.7 Ω

Coil Inductance Le                  0.40 mH

Mechanical Q Factor Qms      6.48

Electrical Q Factor Qes           0.57

Total Q Factor Qts                 0.52

BL Product BL                       15.10 Tm

Effective Moving Mass Mms 144 g

Equivalent Cas Air-Load Vas 530.45 Liters

Effective Piston Area Sd         0.0550 Sqm

Half-Space Efficiency Eff       1.43 %

Airgap Height Hag                  8.0 mm

Voice Coil Height Hvc            20 mm

Voice Coil Overhang Xmax     6 mm