Tang Band W4-2089

• Sensitivity (1W, 1m, infinite baffle) SPL1W 78.1dB
• Frequency response 35 - 800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 4.73
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 60cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.198mH
• VC Diameter 38.5mm

Magnet

• Force factor Bl 8.69N/A
• Motor constant Bl/√RE 4.58N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 98mm
• Effective area SD 75cm²
• Moving mass MMS 39.9g
• Moving mass (without air load) MMD 39.5g
• Material Polypropylene-Mica

Suspensions

• Stiffness KMS 2.36N/mm
• Compliance CMS 424µm/N
• Equivalent volume to the compliance VAS 3.39L
• Mechanical resistance RMS 1.86N·s/m
• Surround material Santoprene

Dimensions

• Nominal diameter 4″
• 102mm
• Volume occupied by the driver (estimated) 1L
• Net weight 2.42kg