Hertz Cento CX 100

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.5dB
• Frequency response 80 - 22Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 100Hz
• Mechanical quality factor QMS 3.10
• Electrical quality factor QES 0.94
• Total quality factor QTS 0.72

Large signal parameters

• Maximum linear excursion xmax 2.3mm
• Air volume displaced at xmax VD 14cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.18mH
• VC Diameter 25mm

Magnet

• Force factor Bl 3.5N/A
• Motor constant Bl/√RE 1.96N/√W
• Diameter 70mm
• Material Ferrite

Diaphragm

• Effective diameter 86mm
• Effective area SD 58.7cm²
• Moving mass MMS 5.1g
• Moving mass (without air load) MMD 4.8g
• Material Semi-pressed paper + Mica

Suspensions

• Stiffness KMS 2.63N/mm
• Compliance CMS 380µm/N
• Equivalent volume to the compliance VAS 1.86L
• Mechanical resistance RMS 1.03N·s/m

Dimensions

• Nominal diameter 4″
• 100mm
• Overall diameter 103mm
• Baffle cutout diameter 93mm
• Overall depth 58mm
• Flange thickness 14mm
• Mounting depth 44mm
• Volume occupied by the driver (estimated) 0.22L
• Net weight 0.96kg