Ciare CZ140

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 159Hz
• Mechanical quality factor QMS 6.80
• Electrical quality factor QES 1.73
• Total quality factor QTS 1.38

Large signal parameters

• Maximum linear excursion xmax 1.1mm
• Air volume displaced at xmax VD 8.4cm³
• Power handling P 40W
• Program power Pmax 90W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz, estimated) LE 0.18mH
• VC Diameter 25mm
• Former material Aluminium

Magnet

• Force factor Bl 2.71N/A
• Motor constant Bl/√RE 1.45N/√W
• Air gap height HAG 4mm

Diaphragm

• Effective diameter 99mm
• Effective area SD 75.9cm²
• Moving mass MMS 3.63g
• Moving mass (without air load) MMD 3.3g

Suspensions

• Stiffness KMS 3.57N/mm
• Compliance CMS 280µm/N
• Equivalent volume to the compliance VAS 2.29L
• Mechanical resistance RMS 0.53N·s/m
• Surround material Polyurethane

Dimensions

• Nominal size 4 x 6″
• 96 x 150mm
• Overall size 96 x 155mm
• Mounting baffle cutout 87 x 144mm
• Overall depth 36mm
• Flange thickness 7mm
• Mounting depth 29mm
• Volume occupied by the driver (estimated) 0.12L
• Frame material Steel