BMS 12N810

Woofer

Nominal diameter12″ / 318 mm
Resonance40.7 Hz
Q factor0.16
Sensitivity97.1 dB
Linear excursion± 2.5 mm
Program Power1200 W
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 97.1dB
  • Frequency response 80 - 2000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 40.7Hz
  • Mechanical quality factor QMS 5.10
  • Electrical quality factor QES 0.17
  • Total quality factor QTS 0.16

Large signal parameters

  • Maximum linear excursion xmax 2.5mm
  • Air volume displaced at xmax VD 133cm³
  • Power handling P 600W
  • Program power Pmax 1200W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.8Ω
  • Inductance (1kHz) LE 0.76mH
  • VC Diameter 101.6mm
  • Winding height HVC 15mm
  • Winding material Copper

Magnet

  • Force factor Bl 24.5N/A
  • Motor constant Bl/√RE 10.2N/√W
  • Air gap height HAG 10mm
  • Material Neodymium

Diaphragm

  • Effective diameter 260mm
  • Effective area SD 531cm²
  • Moving mass MMS 68g
  • Moving mass (without air load) MMD 59.2g

Suspensions

  • Stiffness KMS 4.35N/mm
  • Compliance CMS 230µm/N
  • Equivalent volume to the compliance VAS 89.6L
  • Mechanical resistance RMS 3.41N·s/m

Dimensions

  • Nominal diameter 12
  • 318mm
  • Overall diameter 318mm
  • Baffle cutout diameter 284mm
  • Overall depth 155mm
  • Volume occupied by the driver (estimated) 2.7L
  • Net weight 5.5kg
  • Frame material Cast Aluminum
BMS 12N810 Impedance
BMS 12N810 SPL & Distortion
BMS 12N810 Dimensions

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