Tang Band WT-998D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.1dB
• Frequency response 70 - 35000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 70Hz
• Mechanical quality factor QMS 3.66
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.35

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 70cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.1mH
• VC Diameter 50mm

Magnet

• Force factor Bl 11N/A
• Motor constant Bl/√RE 5.8N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 211mm
• Effective area SD 350cm²
• Moving mass MMS 30g
• Moving mass (without air load) MMD 25.3g
• Material Air Dry Paper

Suspensions

• Stiffness KMS 5.75N/mm
• Compliance CMS 174µm/N
• Equivalent volume to the compliance VAS 30.2L
• Mechanical resistance RMS 3.61N·s/m
• Surround material Fabric

Dimensions

• Nominal diameter 10″
• 254mm
• Volume occupied by the driver (estimated) 2L
• Net weight 4.6kg