BMS BMS18S450L 18 S 450 L – 18″ Subwoofer 1200 W 8 Ohm

• 95 dB Sensitivity 1 W / 1 m
• 1.200 W Power Handling
• 4" Copper Sandwich Voice Coil for low Power Compression
• Double treated Cone for Water Protection
• Triple Aluminum demodulating Rings for ultra low Distortion
• Optimal for high output Subwoofers

                      Specifications

Nominal Diameter                       545 mm (21“)
Nominal Impedance                        4 Ω
Rated Power AES                           1000 W
Continuous Program Power                  2000 W
Sensitivity @ 1W/1m                       97.0 dB
Voice Coil Diameter                     100 mm (4“)
Voice Coil Winding Depth                  25 mm
Magnetic Gap Depth                        17 mm
Flux Density                              0.94 T
Magnet Weight                              536 g
Net Weight                                10.5 kg

Manual/Εγχειρίδιο

• 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

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

• General

  • Product type : Cone driver
  • Brand : B&C Speakers
  • Manufacturer reference : 18PS76

• Informations

  • Nominal impedance : 8 ohm
  • Dimensional category : 18 inch
  • Frequency coverage type : Sub, Low
  • Manufacturer sensitivity : 99 dB
  • Calculated sensitivity : 98.11 dB
  • Nominal power handling : 600 W
  • Bandwidth : 40÷2000 Hz

• Fundamental parameters

  • Sd : 1210 cm²
  • Mms : 149 gr
  • Le : 1.9 mH
  • Re : 5 ohm
  • BL : 25.8 T.m

• Small signal parameters

  • Fs : 39 Hz
  • Qes : 0.29
  • Qms : 6.1
  • Qts : 0.27
  • Vas : 207 L

• Datas

  • Xmax : ±7 mm
  • EBP : 134 Hz
  • Zmin : 6.5 ohm
  • Fs / Qts : 144 Hz
  • Vas * Qts² : 15.1 L
  • Efficiency : 4 %
  • Calculated efficiency : 4.07 %
  • Weight : ~10.7 kg

• Dimensions

  • Voice coil diameter : 3 inch
  • Winding depth : 24 mm
  • Gap height : 11 mm
  • Outside diameter : 460 mm
  • Baffle cutout diameter : 422 mm
  • Front thickness : 16 mm
  • Depth after front : 186 mm

• Shape & Materials

  • Front chape : Cylindrical
  • Magnet type : Ferrite
  • Basket masterial : Aluminium
  • Winding material : Copper
  • Voice coil former : Glass fiber