Wavecor WF120BD05/09

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.9dB
• Frequency response 48 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 48Hz
• Mechanical quality factor QMS 7.40
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 22cm³
• Power handling P 60W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.087mH
• VC Diameter 32mm
• Winding height HVC 12mm

Magnet

• Force factor Bl 4.1N/A
• Motor constant Bl/√RE 2.29N/√W
• Air gap height HAG 4mm
• Weight 0.37kg

Diaphragm

• Effective diameter 83mm
• Effective area SD 54cm²
• Moving mass MMS 7.3g
• Moving mass (without air load) MMD 7g

Suspensions

• Stiffness KMS 0.667N/mm
• Compliance CMS 1500µm/N
• Equivalent volume to the compliance VAS 6.2L
• Mechanical resistance RMS 0.3N·s/m

Dimensions

• Nominal diameter 4.75″
• 121mm
• Volume occupied by the driver (estimated) 0.4L
• Net weight 1.0kg