BMS 8S219

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.4dB
• Frequency response 80 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 82Hz
• Mechanical quality factor QMS 4.80
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.41

Large signal parameters

• Maximum linear excursion xmax 6.3mm
• Air volume displaced at xmax VD 140cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.52mH
• VC Diameter 52mm
• Winding height HVC 19mm
• Winding material Copper

Magnet

• Force factor Bl 13.3N/A
• Motor constant Bl/√RE 5.52N/√W
• Air gap height HAG 6.5mm
• Material Ferrite

Diaphragm

• Effective diameter 168mm
• Effective area SD 222cm²
• Moving mass MMS 26.6g
• Moving mass (without air load) MMD 24.2g

Suspensions

• Stiffness KMS 7.14N/mm
• Compliance CMS 140µm/N
• Equivalent volume to the compliance VAS 9.7L
• Mechanical resistance RMS 2.86N·s/m

Dimensions

• Nominal diameter 8″
• 203mm
• Volume occupied by the driver (estimated) 0.85L
• Frame material Cast Aluminum