mivoc WPT 138

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.4dB
• Frequency response 51 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 51Hz
• Mechanical quality factor QMS 3.60
• Electrical quality factor QES 0.52
• Total quality factor QTS 0.45

Large signal parameters

• Maximum linear excursion xmax 3.5mm
• Air volume displaced at xmax VD 29cm³
• Power handling P 70W
• Program power Pmax 180W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 0.5mH
• VC Diameter 25mm
• Winding height HVC 13mm

Magnet

• Force factor Bl 5.5N/A
• Motor constant Bl/√RE 2.19N/√W

Diaphragm

• Effective diameter 102mm
• Effective area SD 82cm²
• Moving mass MMS 7.9g
• Moving mass (without air load) MMD 7.3g

Suspensions

• Stiffness KMS 0.822N/mm
• Compliance CMS 1216µm/N
• Equivalent volume to the compliance VAS 11.6L
• Mechanical resistance RMS 0.7N·s/m

Dimensions

• Nominal diameter 5.25″
• 13mm
• Overall diameter 145mm
• Baffle cutout diameter 110mm
• Overall depth 67mm
• Flange thickness 4mm
• Mounting depth 63mm
• Volume occupied by the driver (estimated) 0.31L