Tang Band W4-1720

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.7dB
• Frequency response 60 - 8000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 60Hz
• Mechanical quality factor QMS 2.33
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 29cm³
• Power handling P 30W
• Program power Pmax 60W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.8Ω
• Inductance (1kHz) LE 0.037mH
• VC Diameter 32mm

Magnet

• Force factor Bl 3.82N/A
• Motor constant Bl/√RE 1.96N/√W
• Air gap height HAG 17mm
• Material Ferrite

Diaphragm

• Effective diameter 85mm
• Effective area SD 57cm²
• Moving mass MMS 5g
• Moving mass (without air load) MMD 4.7g
• Material Paper

Suspensions

• Stiffness KMS 0.779N/mm
• Compliance CMS 1284µm/N
• Equivalent volume to the compliance VAS 5.92L
• Mechanical resistance RMS 0.81N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 4″
• 102mm
• Volume occupied by the driver (estimated) 0.78L
• Net weight 1.913kg