Tang Band W4-1129E

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.1dB
• Frequency response 120 - 12000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 120Hz
• Mechanical quality factor QMS 9.43
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.44

Large signal parameters

• Maximum linear excursion xmax 1.8mm
• Air volume displaced at xmax VD 10cm³
• Power handling P 25W
• Program power Pmax 50W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 0.076mH
• VC Diameter 25.4mm

Magnet

• Force factor Bl 5.17N/A
• Motor constant Bl/√RE 2.76N/√W
• Air gap height HAG 4mm
• Material Ferrite

Diaphragm

• Effective diameter 85mm
• Effective area SD 57cm²
• Moving mass MMS 4.61g
• Moving mass (without air load) MMD 4.3g
• Material Paper

Suspensions

• Stiffness KMS 2.69N/mm
• Compliance CMS 372µm/N
• Equivalent volume to the compliance VAS 1.72L
• Mechanical resistance RMS 0.37N·s/m
• Surround material Santoprene

Dimensions

• Nominal diameter 4″
• 102mm
• Volume occupied by the driver (estimated) 0.44L
• Net weight 1.113kg