Wavecor WF120BD11

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.3dB
• Frequency response 56 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 56.5Hz
• Mechanical quality factor QMS 9.40
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 14cm³

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.0Ω
• Inductance (1kHz, estimated) LE 0.13mH
• VC Diameter 25mm
• Winding height HVC 10mm
• Former material Black fiber glass

Magnet

• Force factor Bl 4.2N/A
• Motor constant Bl/√RE 2.42N/√W
• Air gap height HAG 4mm
• Diameter 90mm
• Weight 0.44kg

Diaphragm

• Effective diameter 78mm
• Effective area SD 48cm²
• Moving mass MMS 6.6g
• Moving mass (without air load) MMD 6.3g
• Material Kevlar/Carbon fiber

Suspensions

• Stiffness KMS 0.833N/mm
• Compliance CMS 1200µm/N
• Equivalent volume to the compliance VAS 3.9L
• Mechanical resistance RMS 0.25N·s/m

Dimensions

• Nominal diameter 4.75″
• 120mm
• Overall diameter 120mm
• Baffle cutout diameter 98mm
• Mounting depth 64mm
• Volume occupied by the driver (estimated) 0.44L
• Net weight 1.1kg
• Frame material Die cast aluminum