Tang Band W8-740P

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.3dB
• Frequency response 30 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 3.69
• 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 120W
• Program power Pmax 240W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.837mH
• VC Diameter 49.5mm

Magnet

• Force factor Bl 13.7N/A
• Motor constant Bl/√RE 7.64N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 94.3g
• Moving mass (without air load) MMD 91.9g
• Material Paper

Suspensions

• Stiffness KMS 3.43N/mm
• Compliance CMS 291µm/N
• Equivalent volume to the compliance VAS 20L
• Mechanical resistance RMS 4.82N·s/m
• Surround material Foam

Dimensions

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