Hertz Cento CS 300 S2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.5dB

Thiele & Small parameters

• Resonance frequency (free air) fS 25Hz
• Mechanical quality factor QMS 7.20
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.46

Large signal parameters

• Maximum linear excursion xmax 12.5mm
• Maximum excursion before damage xlim 16.5mm
• Air volume displaced at xmax VD 693cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 2Ω
• DC resistance RE 2.2Ω
• Inductance (1kHz) LE 2.8mH
• VC Diameter 35mm

Magnet

• Force factor Bl 12N/A
• Motor constant Bl/√RE 8.09N/√W
• Diameter 134mm
• Height 34mm
• Material Ferrite

Diaphragm

• Effective diameter 267mm
• Effective area SD 555cm²
• Moving mass MMS 205g
• Moving mass (without air load) MMD 196g
• Material Polyproyilene

Suspensions

• Stiffness KMS 5N/mm
• Compliance CMS 200µm/N
• Equivalent volume to the compliance VAS 87.3L
• Mechanical resistance RMS 4.47N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 318mm
• Baffle cutout diameter 281mm
• Overall depth 147mm
• Flange thickness 17mm
• Mounting depth 130mm
• Volume occupied by the driver (estimated) 2.4L
• Net weight 4.844kg