Tang Band W8-670T

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.1dB
• Frequency response 40 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 5.87
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.45

Large signal parameters

• Maximum linear excursion xmax 7.9mm
• Air volume displaced at xmax VD 173cm³
• Power handling P 80W
• Program power Pmax 160W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.72mH
• VC Diameter 38.5mm

Magnet

• Force factor Bl 9.43N/A
• Motor constant Bl/√RE 4.97N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 50g
• Moving mass (without air load) MMD 47.6g
• Material Paper

Suspensions

• Stiffness KMS 2.95N/mm
• Compliance CMS 339µm/N
• Equivalent volume to the compliance VAS 23.3L
• Mechanical resistance RMS 2.14N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 8″
• 203mm
• Volume occupied by the driver (estimated) 1.3L
• Net weight 3.0kg