MASTER AUDIO LSN18/4 – 18″ professional ferrite subwoofer 4Ω 800Wrms 97dB

Nominal Specifications

    Nominal Diameter 18“, 460 mm
    Overall Diameter 18.11“, 460 mm
    Bolt Circle Diameter 17.32“, 440 mm
    Baffle Cutout Diameter 16.61“, 422 mm
    Depth 7.95“, 202 mm
    Flange and Gasket Thickness 0.55“, 13.9 mm


Electrical Specifications

    Minimum Impedance 6.6 Ohm
    Nominal Impedance 8 Ohm
    Nominal Power Handling*** 1,000 W
    Maximum Power Handling**** 2,000 W
    Sensitivity (1W/1m) 99 dB
    Frequency Range 38 - 2500 Hz
    Voice Coil Diameter 4“, 100 mm
    Winding Material Aluminium
    Former Material Glass Fiber
    Winding Depth 0.9“, 23 mm
    Magnetic Gap Depth 0.47“, 12 mm
    Flux Density 1.3 T


THIELE & SMALL Parameters

    Resonant Frequency (fs) 38 Hz
    DC Resistance (Re) 5.5 Ohm
    BL Product (BL) 24.5 N/A
    Diaphragm Mass inc. Airload (Mms) 163 grams
    Mechanical Compliance of Suspension (Cms) 0.11 mm/N
    Rms 4.42 Kg/s
    Electromagnetic Q (Qes) 0.35
    Mechanical Q (Qms) 8.75
    Total Q (Qts) 0.34
    Compliance Equivalent Volume (Vas) 7.37 ft³, 208.8 dm³
    Surface Area of Cone (Sd) 180.7“², 1,166 cm²
    Maximum Linear Excursion (Xmax)* 9.5 mm
    Xdamage** 17.5 mm
    Coil Inductance (Le) 1.36 mH
    Diaphragm mass (Mmd) 141 g
    Eta Zero 3.14 %

Notes

    *Xmax = [(winding depth - magnetic gap depth) / 2] + (magnetic gap depth / 3)
    **Maximum excursion before permanent damage
    ***2 Hours Test According to AES 2-1984 Rev. 2003
    ****Maximum power is defined as 3dB greater than nominal power

Nominal Diameter     460 mm (18 in)
Overall Diameter     460 mm (18.11 in)
Bolt Circle Diameter     440 mm (17.32 in)
Baffle Cutout Diameter     424 mm (16.7 in)
Depth     202 mm (7.95 in)
Flange and Gasket Thickness     13.9 mm (0.55 in)
Net Weight     4.7 Kg (10.4 lb)
Shipping Box
(Single Carton Box)     536x536x293 mm (21.1x21.1x11.5 in)
Shipping Weight     6 Kg (13.2 lb)

Nominal Impedance     8 Ohm
Minimum Impedance     6 Ohm
Nominal Power Handling ***     600 W
Maximum Power Handling ****     1200 W
Sensitivity (1W/1m)     99 dB
Frequency Range     30÷3150 Hz
Voice Coil Diameter     77 mm (3 in)
Winding Material     Cu
Former Material     Glass Fiber
Winding Depth     22 mm (0.87 in)
Magnetic Gap Depth     10.5 mm (0.41 in)
Flux Density     1.2 T

Fs     30 Hz
Re     5.1 Ohm
Qes     0.34
Qms     8.68
Qts     0.33
Vas     404.2 dm^3 (14.27 ft^3)
Sd     1166 cm^2 (180.7 in^2)
Xmax *     9.25 mm
Xdamage **     17.5 mm
Mms     134.3 g
Bl     19.5 N/A
Le     1.35 mH
Mmd     112.6 g
Cms     0.21 mm/N
Rms     2.91 Kg/s
Eta Zero     3.1 %
EBP     88 Hz
      

• 1000Wrms continuous power handling (AES Standard)
• Flexirol™ technology for greater excursion control
• Double suspension for exceptional linearity at the highest excursions
• Saturated gap technology for lower harmonic distortion
• Extremely low frequency response, down to 30Hz
• Smart chassis design minimises acoustic distortion