Hertz Cento CS 200 S4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.9dB

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 5.00
• Electrical quality factor QES 0.58
• Total quality factor QTS 0.52

Large signal parameters

• Maximum linear excursion xmax 9mm
• Maximum excursion before damage xlim 11.5mm
• Air volume displaced at xmax VD 193cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.3Ω
• Inductance (1kHz) LE 1.7mH
• VC Diameter 35mm

Magnet

• Force factor Bl 10.6N/A
• Motor constant Bl/√RE 5.84N/√W
• Diameter 120mm
• Height 28mm
• Material Ferrite

Diaphragm

• Effective diameter 172mm
• Effective area SD 215cm²
• Moving mass MMS 76.8g
• Moving mass (without air load) MMD 74.4g
• Material Polyproyilene

Suspensions

• Stiffness KMS 4.76N/mm
• Compliance CMS 210µm/N
• Equivalent volume to the compliance VAS 13.7L
• Mechanical resistance RMS 3.86N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 213mm
• Baffle cutout diameter 177mm
• Overall depth 114mm
• Flange thickness 13mm
• Mounting depth 101mm
• Volume occupied by the driver (estimated) 1.1L
• Net weight 2.87kg