Hertz DCX 170.3

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.9dB
• Frequency response 60 - 21000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 85Hz
• Mechanical quality factor QMS 4.39
• Electrical quality factor QES 1.21
• Total quality factor QTS 0.95

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 28cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz, estimated) LE 0.34mH
• VC Diameter 25mm

Magnet

• Force factor Bl 3.7N/A
• Motor constant Bl/√RE 1.95N/√W
• Material High density flux ferrite

Diaphragm

• Effective diameter 133mm
• Effective area SD 141cm²
• Moving mass MMS 8.8g
• Moving mass (without air load) MMD 7.6g
• Material Water-repellent pressed paper

Suspensions

• Stiffness KMS 2.5N/mm
• Compliance CMS 400µm/N
• Equivalent volume to the compliance VAS 11.3L
• Mechanical resistance RMS 1.07N·s/m

Dimensions

• Nominal diameter 6.7″
• 170mm
• Volume occupied by the driver (estimated) 0.54L