Tang Band WQ-1858

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.8dB
• Frequency response 20 - 400Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 20Hz
• Mechanical quality factor QMS 3.88
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.45

Large signal parameters

• Maximum linear excursion xmax 13.3mm
• Air volume displaced at xmax VD 665cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.8Ω
• Inductance (1kHz) LE 1.48mH
• VC Diameter 49.5mm

Magnet

• Force factor Bl 17.6N/A
• Motor constant Bl/√RE 6.76N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 252mm
• Effective area SD 500cm²
• Moving mass MMS 180g
• Moving mass (without air load) MMD 172g
• Material Aluminium

Suspensions

• Stiffness KMS 3.05N/mm
• Compliance CMS 328µm/N
• Equivalent volume to the compliance VAS 117L
• Mechanical resistance RMS 5.82N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 12″
• 305mm
• Volume occupied by the driver (estimated) 3.6L
• Net weight 8.0kg