Hertz MPX 165.3 PRO

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.5dB
• Frequency response 45 - 21500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 90Hz
• Mechanical quality factor QMS 5.50
• Electrical quality factor QES 1.06
• Total quality factor QTS 0.88

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 41cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz) LE 0.01mH
• VC Diameter 36mm

Magnet

• Force factor Bl 5.8N/A
• Motor constant Bl/√RE 3.29N/√W
• Material High density flux ferrite

Diaphragm

• Effective diameter 132mm
• Effective area SD 137cm²
• Moving mass MMS 18.9g
• Moving mass (without air load) MMD 17.7g
• Material Pressed-pulp cone with cotton fibers

Suspensions

• Stiffness KMS 6.67N/mm
• Compliance CMS 150µm/N
• Equivalent volume to the compliance VAS 4L
• Mechanical resistance RMS 1.94N·s/m

Dimensions

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