Beyma 8NMFW

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.8dB
• Frequency response 30 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 37Hz
• Mechanical quality factor QMS 7.60
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 9mm
• Maximum excursion before damage xlim 43mm
• Air volume displaced at xmax VD 204cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz) LE 1.1mH
• VC Diameter 50.8mm
• Winding height HVC 20mm

Magnet

• Force factor Bl 13.4N/A
• Motor constant Bl/√RE 5.61N/√W
• Air gap height HAG 6mm

Diaphragm

• Effective diameter 170mm
• Effective area SD 227cm²
• Moving mass MMS 48g
• Moving mass (without air load) MMD 45.4g

Suspensions

• Stiffness KMS 2.66N/mm
• Compliance CMS 376µm/N
• Equivalent volume to the compliance VAS 27L
• Mechanical resistance RMS 1.5N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 227mm
• Baffle cutout diameter 181mm
• Overall depth 137mm
• Volume occupied by the driver (estimated) 1.5L
• Net weight 3.7kg