Tang Band W4-1052SDF

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.7dB
• Frequency response 70 - 17000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 70Hz
• Mechanical quality factor QMS 4.80
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 2.6mm
• Air volume displaced at xmax VD 15cm³
• Power handling P 20W
• Program power Pmax 40W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.8Ω
• Inductance (1kHz) LE 0.077mH
• VC Diameter 25.4mm

Magnet

• Force factor Bl 4.1N/A
• Motor constant Bl/√RE 2.1N/√W
• Air gap height HAG 2.5mm
• Material Ferrite

Diaphragm

• Effective diameter 85mm
• Effective area SD 57cm²
• Moving mass MMS 4.61g
• Moving mass (without air load) MMD 4.3g
• Material Structured Polypropylene

Suspensions

• Stiffness KMS 0.886N/mm
• Compliance CMS 1129µm/N
• Equivalent volume to the compliance VAS 5.21L
• Mechanical resistance RMS 0.42N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 4″
• 102mm
• Volume occupied by the driver (estimated) 0.74L
• Net weight 1.803kg