Hertz Mille MP 300 D2.3 PRO

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.9dB

Thiele & Small parameters

• Resonance frequency (free air) fS 23Hz
• Mechanical quality factor QMS 5.90
• Electrical quality factor QES 0.53
• Total quality factor QTS 0.48

Large signal parameters

• Maximum linear excursion xmax 16mm
• Maximum excursion before damage xlim 26mm
• Air volume displaced at xmax VD 850cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 4.0Ω
• Inductance (1kHz, in series) LE 2.52mH
• VC Diameter 65mm

Magnet

• Force factor (in series) Bl 15.4N/A
• Motor constant Bl/√RE 7.7N/√W
• Diameter 165mm
• Height 35mm
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 221g
• Moving mass (without air load) MMD 212g
• Material Pressed-pulp cone with mineral powders

Suspensions

• Stiffness KMS 4.55N/mm
• Compliance CMS 220µm/N
• Equivalent volume to the compliance VAS 88L
• Mechanical resistance RMS 5.41N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 321mm
• Baffle cutout diameter 284mm
• Overall depth 187mm
• Flange thickness 23mm
• Mounting depth 164mm
• Volume occupied by the driver (estimated) 4.1L
• Net weight 8.63kg