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

• 95 dB Sensitivity 1 W / 1 m
• 1.200 W Power Handling
• 4" Copper Sandwich Voice Coil for low Power Compression
• Neodymium Magnet System
• Double treated Cone for Water Protection
• Triple Aluminum demodulating Rings for ultra low Distortion
• Optimal for high Output Subwoofers
• Leight Weight Carbon Fiber Diaphragm

• Shape Cylindrical
• Product type Cone driver
• Brand Sica
• Frequency coverage type Sub
• Dimensional category 18 inch
• Front chape Cylindrical
• Magnet type Ferrite
• Basket masterial Aluminium
• Nominal impedance 4 ohm
• Nominal power handling 700 W
• Max power handling 1400 W
• Sensitivity 97.9 dB
• Voice coil diameter 4 inch
• Flux density 1.12 T
• External diametre 462 mm
• Mounting diametre 415 mm
• Depth 203.5 mm
• Depth after front 188.5 mm
• Front thickness 15 mm
• Diamètre aimant (mm) 220 mm
• Weight 13.9 kg
• Fs 36.9 Hz
• Re 3.25 ohm
• Qes 0.29
• Qms 9.03
• Qts 0.28
• Vas 181.9 L
• Sd 1164.2 cm²
• Cms 95 µm/N
• Efficiency 3.02 %
• Xmax 6 mm
• Mms 196.2 gr
• BL 22.55 T.m
• Le 1.03 mH
• EBP 127
• Dome material Paper
• Cone material Paper
• Surround material Cloth
• Shipping weight 13.9 kg

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 35 - 1600 Hz
    Voice Coil Diameter 4“, 100 mm
    Winding Material Copper
    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) 35 Hz
    DC Resistance (Re) 5.4 Ohm
    BL Product (BL) 27.2 N/A
    Diaphragm Mass inc. Airload (Mms) 182 grams
    Mechanical Compliance of Suspension (Cms) 0.11 mm/N
    Rms 4.1 Kg/s
    Electromagnetic Q (Qes) 0.29
    Mechanical Q (Qms) 9.74
    Total Q (Qts) 0.28
    Compliance Equivalent Volume (Vas) 7.74 ft³, 219.2 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) 1.7 mH
    Diaphragm mass (Mmd) 159.5 g
    Eta Zero 3.1 %

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