Beyma 6NMFW

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.3dB
• Frequency response 35 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 7.50
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 9mm
• Maximum excursion before damage xlim 43mm
• Air volume displaced at xmax VD 139cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.95mH
• VC Diameter 50.8mm
• Winding height HVC 20mm

Magnet

• Force factor Bl 14N/A
• Motor constant Bl/√RE 5.81N/√W
• Air gap height HAG 6mm

Diaphragm

• Effective diameter 140mm
• Effective area SD 154cm²
• Moving mass MMS 45g
• Moving mass (without air load) MMD 43.6g

Suspensions

• Stiffness KMS 2.92N/mm
• Compliance CMS 342µm/N
• Equivalent volume to the compliance VAS 11L
• Mechanical resistance RMS 1.52N·s/m

Dimensions

• Nominal diameter 6.5″
• 165mm
• Overall diameter 176mm
• Baffle cutout diameter 158mm
• Overall depth 121mm
• Volume occupied by the driver (estimated) 1.2L
• Net weight 3.5kg