Tang Band W4-1805S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.1dB
• Frequency response 80 - 8500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 80Hz
• Mechanical quality factor QMS 1.29
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 0.5mm
• Air volume displaced at xmax VD 2.6cm³
• Power handling P 35W
• Program power Pmax 70W

Voice Coil

• Nominal impedance Z 6Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.01mH
• VC Diameter 38.5mm

Magnet

• Force factor Bl 5.88N/A
• Motor constant Bl/√RE 2.48N/√W
• Air gap height HAG 6mm
• Material Neodymium

Diaphragm

• Effective diameter 85mm
• Effective area SD 57cm²
• Moving mass MMS 3.99g
• Moving mass (without air load) MMD 3.7g
• Material Aluminum

Suspensions

• Stiffness KMS 0.822N/mm
• Compliance CMS 1216µm/N
• Equivalent volume to the compliance VAS 5.61L
• Mechanical resistance RMS 1.55N·s/m
• Surround material Foam Rubber

Dimensions

• Nominal diameter 4″
• 102mm
• Volume occupied by the driver (estimated) 0.14L