Hertz Mille MP 70.3 PRO

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.6dB
• Frequency response 180 - 18000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 110Hz
• Mechanical quality factor QMS 4.60
• Electrical quality factor QES 1.00
• Total quality factor QTS 0.82

Large signal parameters

• Maximum linear excursion xmax 1.5mm
• Air volume displaced at xmax VD 4.8cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.7Ω
• Inductance (1kHz) LE 0.12mH
• VC Diameter 20mm

Magnet

• Force factor Bl 2.8N/A
• Motor constant Bl/√RE 1.46N/√W
• Diameter 20mm
• Height 2mm
• Material Neodymium

Diaphragm

• Effective diameter 65mm
• Effective area SD 31.7cm²
• Moving mass MMS 2.9g
• Moving mass (without air load) MMD 2.8g
• Material Pressed-pulp cone with cotton fibers

Suspensions

• Stiffness KMS 1.43N/mm
• Compliance CMS 700µm/N
• Equivalent volume to the compliance VAS 1L
• Mechanical resistance RMS 0.44N·s/m

Dimensions

• Nominal diameter 3″
• 70mm
• Overall diameter 88mm
• Baffle cutout diameter 73mm
• Overall depth 50mm
• Flange thickness 6mm
• Mounting depth 44mm
• Volume occupied by the driver (estimated) 0.11L
• Net weight 0.17kg