Hertz Cento C 130

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 80Hz
• Mechanical quality factor QMS 3.90
• Electrical quality factor QES 0.72
• Total quality factor QTS 0.61

Large signal parameters

• Maximum linear excursion xmax 3.1mm
• Air volume displaced at xmax VD 30cm³
• Power handling P 70W
• Program power Pmax 140W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.17mH
• VC Diameter 25mm

Magnet

• Force factor Bl 4.1N/A
• Motor constant Bl/√RE 2.29N/√W

Diaphragm

• Effective diameter 110mm
• Effective area SD 95cm²
• Moving mass MMS 8g
• Moving mass (without air load) MMD 7.4g

Suspensions

• Stiffness KMS 2N/mm
• Compliance CMS 500µm/N
• Equivalent volume to the compliance VAS 6.3L
• Mechanical resistance RMS 1.03N·s/m

Dimensions

• Nominal diameter 5″
• 130mm
• Overall diameter 130mm
• Baffle cutout diameter 119mm
• Overall depth 66mm
• Flange thickness 16mm
• Mounting depth 50mm
• Volume occupied by the driver (estimated) 0.23L
• Net weight 0.7kg