Wavecor WF120BD04/08

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.2dB
• Frequency response 71 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 71.5Hz
• Mechanical quality factor QMS 5.90
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.45

Large signal parameters

• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 0.14mH
• VC Diameter 26mm
• Winding height HVC 12mm

Magnet

• Force factor Bl 5.5N/A
• Motor constant Bl/√RE 2.25N/√W
• Air gap height HAG 4mm
• Weight 0.43kg

Diaphragm

• Effective diameter 83mm
• Effective area SD 54cm²
• Moving mass MMS 6.25g
• Moving mass (without air load) MMD 5.9g

Suspensions

• Stiffness KMS 0.971N/mm
• Compliance CMS 1030µm/N
• Equivalent volume to the compliance VAS 4.25L
• Mechanical resistance RMS 0.42N·s/m

Dimensions

• Nominal diameter 4.75″
• 121mm
• Volume occupied by the driver (estimated) 0.41L
• Net weight 1.04kg