Tang Band W57-1781

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.7dB
• Frequency response 40 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 2.12
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 42cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.2Ω
• Inductance (1kHz) LE 0.384mH
• VC Diameter 38.5mm

Magnet

• Force factor Bl 10.4N/A
• Motor constant Bl/√RE 3.86N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 134mm
• Effective area SD 140cm²
• Moving mass MMS 20g
• Moving mass (without air load) MMD 19.1g
• Material Black Polypropylene-Mica

Suspensions

• Stiffness KMS 1.03N/mm
• Compliance CMS 975µm/N
• Equivalent volume to the compliance VAS 26L
• Mechanical resistance RMS 2.37N·s/m
• Surround material Rubber

Dimensions

• Nominal size 5 x 7″
• 127 x 178mm
• Volume occupied by the driver (estimated) 0.76L
• Net weight 1.854kg