Tang Band W4-1798S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.2dB
• Frequency response 60 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 60Hz
• Mechanical quality factor QMS 1.61
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.30

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 23cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.009mH
• VC Diameter 49.5mm

Magnet

• Force factor Bl 5.75N/A
• Motor constant Bl/√RE 3.03N/√W
• Air gap height HAG 12mm
• Material Neodymium

Diaphragm

• Effective diameter 100mm
• Effective area SD 78cm²
• Moving mass MMS 9.98g
• Moving mass (without air load) MMD 9.6g
• Material Sandwich

Suspensions

• Stiffness KMS 1.18N/mm
• Compliance CMS 848µm/N
• Equivalent volume to the compliance VAS 7.42L
• Mechanical resistance RMS 2.34N·s/m
• Surround material Foam Rubber

Dimensions

• Nominal diameter 4″
• 102mm
• Volume occupied by the driver (estimated) 0.48L
• Net weight 1.193kg