VOLT BM165.1

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.4dB
• Frequency response 50 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 4.12
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 6.3mm
• Maximum excursion before damage xlim 12mm
• Air volume displaced at xmax VD 97cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 1.2mH
• VC Diameter 38mm
• Winding material Copper

Magnet

• Force factor Bl 9.8N/A
• Motor constant Bl/√RE 4.18N/√W
• Weight 1.55kg
• Material Ferrite

Diaphragm

• Effective diameter 140mm
• Effective area SD 154cm²
• Moving mass MMS 25g
• Moving mass (without air load) MMD 23.5g
• Material Coated Black HIPS

Suspensions

• Stiffness KMS 0.813N/mm
• Compliance CMS 1230µm/N
• Equivalent volume to the compliance VAS 40.8L
• Mechanical resistance RMS 1.14N·s/m
• Surround material Low Loss Rubber

Dimensions

• Nominal diameter 6.5″
• 165mm
• Overall diameter 189mm
• Baffle cutout diameter 163mm
• Overall depth 90mm
• Flange thickness 6mm
• Mounting depth 84mm
• Volume occupied by the driver 0.7L
• Net weight 1.95kg
• Frame material Diecast Aluminium Vented