Beyma 6G40Nd

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.8dB
• Frequency response 90 - 8000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 85Hz
• Mechanical quality factor QMS 3.70
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 3mm
• Maximum excursion before damage xlim 20mm
• Air volume displaced at xmax VD 42cm³
• Power handling P 170W
• Program power Pmax 340W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 0.2mH
• VC Diameter 50.8mm
• Winding height HVC 9mm

Magnet

• Force factor Bl 11.2N/A
• Motor constant Bl/√RE 4.57N/√W
• Air gap height HAG 7mm

Diaphragm

• Effective diameter 134mm
• Effective area SD 140cm²
• Moving mass MMS 14g
• Moving mass (without air load) MMD 12.7g

Suspensions

• Stiffness KMS 4N/mm
• Compliance CMS 250µm/N
• Equivalent volume to the compliance VAS 7L
• Mechanical resistance RMS 2N·s/m

Dimensions

• Nominal diameter 6.5″
• 165mm
• Overall diameter 188mm
• Baffle cutout diameter 146mm
• Overall depth 78mm
• Volume occupied by the driver (estimated) 0.55L
• Net weight 1.6kg