BMS 8N515

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.5dB
• Frequency response 80 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 87.7Hz
• Mechanical quality factor QMS 4.34
• Electrical quality factor QES 0.32
• Total quality factor QTS 0.30

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 89cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.32mH
• VC Diameter 52mm
• Winding height HVC 15mm
• Winding material Copper

Magnet

• Force factor Bl 13.8N/A
• Motor constant Bl/√RE 5.94N/√W
• Air gap height HAG 7mm
• Material Neodymium

Diaphragm

• Effective diameter 168mm
• Effective area SD 222cm²
• Moving mass MMS 20.6g
• Moving mass (without air load) MMD 18.2g

Suspensions

• Stiffness KMS 6.25N/mm
• Compliance CMS 160µm/N
• Equivalent volume to the compliance VAS 11L
• Mechanical resistance RMS 2.62N·s/m

Dimensions

• Nominal diameter 8″
• 205mm
• Overall diameter 205mm
• Baffle cutout diameter 182mm
• Overall depth 102mm
• Volume occupied by the driver (estimated) 0.8L
• Net weight 1.98kg
• Frame material Cast Aluminum