Tang Band W8-740M

• Sensitivity (1W, 1m, infinite baffle) SPL1W 82.8dB
• Frequency response 30 - 800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 4.29
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 12mm
• Air volume displaced at xmax VD 264cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.87mH
• VC Diameter 50mm

Magnet

• Force factor Bl 14.3N/A
• Motor constant Bl/√RE 8.01N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 120g
• Moving mass (without air load) MMD 117g
• Material Paper

Suspensions

• Stiffness KMS 4.67N/mm
• Compliance CMS 214µm/N
• Equivalent volume to the compliance VAS 14.7L
• Mechanical resistance RMS 5.26N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 8″
• 203mm
• Volume occupied by the driver (estimated) 2.5L
• Net weight 5.8kg