VISATON WS 20 E - 4 Ohm

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.4dB
• Frequency response 47 - 7000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 47Hz
• Mechanical quality factor QMS 5.56
• Electrical quality factor QES 1.44
• Total quality factor QTS 1.14

Large signal parameters

• Maximum linear excursion xmax 3mm
• Maximum excursion before damage xlim 6mm
• Air volume displaced at xmax VD 72cm³
• Power handling P 80W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.3Ω
• Inductance (1kHz) LE 0.7mH
• VC Diameter 30mm
• Winding height HVC 11mm

Magnet

• Flux density B 0.85T
• Force factor Bl 4.5N/A
• Motor constant Bl/√RE 2.48N/√W
• Air gap height HAG 5mm

Diaphragm

• Effective diameter 175mm
• Effective area SD 240cm²
• Moving mass MMS 23g
• Moving mass (without air load) MMD 20.5g

Suspensions

• Stiffness KMS 2.1N/mm
• Compliance CMS 477µm/N
• Equivalent volume to the compliance VAS 39L
• Mechanical resistance RMS 1.22N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Baffle cutout diameter 186mm
• Volume occupied by the driver (estimated) 0.52L
• Net weight 1.3kg