Tang Band W8-670Q

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.8dB
• Frequency response 38 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38Hz
• Mechanical quality factor QMS 5.35
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.46

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 154cm³
• Power handling P 70W
• Program power Pmax 140W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.5Ω
• Inductance (1kHz) LE 0.961mH
• VC Diameter 38.5mm

Magnet

• Force factor Bl 12.3N/A
• Motor constant Bl/√RE 4.81N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 49.9g
• Moving mass (without air load) MMD 47.6g
• Material Paper

Suspensions

• Stiffness KMS 2.76N/mm
• Compliance CMS 363µm/N
• Equivalent volume to the compliance VAS 25L
• Mechanical resistance RMS 2.23N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 8″
• 203mm
• Volume occupied by the driver (estimated) 1.3L
• Net weight 3.08kg