Hertz DCX 165.3

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.8dB
• Frequency response 60 - 21000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 68Hz
• Mechanical quality factor QMS 7.54
• Electrical quality factor QES 0.96
• Total quality factor QTS 0.85

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 29cm³
• Power handling P 60W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.3Ω
• Inductance (1kHz, estimated) LE 0.36mH
• VC Diameter 25mm

Magnet

• Force factor Bl 4N/A
• Motor constant Bl/√RE 2.2N/√W
• Material High density flux ferrite

Diaphragm

• Effective diameter 135mm
• Effective area SD 143cm²
• Moving mass MMS 11g
• Moving mass (without air load) MMD 9.8g
• Material Water-repellent pressed paper

Suspensions

• Stiffness KMS 2.04N/mm
• Compliance CMS 490µm/N
• Equivalent volume to the compliance VAS 14.3L
• Mechanical resistance RMS 0.62N·s/m

Dimensions

• Nominal diameter 6.5″
• 165mm
• Volume occupied by the driver (estimated) 0.5L