Tang Band W8-740Q

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84dB
• Frequency response 32 - 700Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 3.01
• Electrical quality factor QES 0.31
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 12.1mm
• Air volume displaced at xmax VD 266cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.88mH
• VC Diameter 49.5mm

Magnet

• Force factor Bl 14.6N/A
• Motor constant Bl/√RE 8.16N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 105g
• Moving mass (without air load) MMD 102g
• Material Paper

Suspensions

• Stiffness KMS 4.38N/mm
• Compliance CMS 228µm/N
• Equivalent volume to the compliance VAS 15.7L
• Mechanical resistance RMS 6.99N·s/m
• Surround material Nitrile Rubber

Dimensions

• Nominal diameter 8″
• 203mm
• Volume occupied by the driver (estimated) 0.85L