Hertz ECX 100.5

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87dB
• Frequency response 80 - 23000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 102Hz
• Mechanical quality factor QMS 3.10
• Electrical quality factor QES 0.76
• Total quality factor QTS 0.61

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 12cm³
• Power handling P 40W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.0Ω
• Inductance (1kHz, estimated) LE 0.19mH
• VC Diameter 25mm

Magnet

• Force factor Bl 3.5N/A
• Motor constant Bl/√RE 2.02N/√W
• Material High density flux ferrite

Diaphragm

• Effective diameter 88mm
• Effective area SD 58.2cm²
• Moving mass MMS 4.8g
• Moving mass (without air load) MMD 4.5g
• Material Water repellent pressed paper

Suspensions

• Stiffness KMS 1.92N/mm
• Compliance CMS 520µm/N
• Equivalent volume to the compliance VAS 2.5L
• Mechanical resistance RMS 0.99N·s/m

Dimensions

• Nominal diameter 4″
• 100mm
• Volume occupied by the driver (estimated) 0.14L