PRV Audio 8MB450-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.8dB
• Frequency response 70 - 6500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 70Hz
• Mechanical quality factor QMS 24.30
• Electrical quality factor QES 0.93
• Total quality factor QTS 0.90

Large signal parameters

• Maximum linear excursion xmax 4.9mm
• Air volume displaced at xmax VD 111cm³
• Power handling P 225W
• Program power Pmax 450W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.4Ω
• Inductance (1kHz) LE 0.38mH
• VC Diameter 50.8mm
• Winding height HVC 12.5mm
• Winding material Copper Clad Aluminium
• Former material Kapton

Magnet

• Force factor Bl 5.61N/A
• Motor constant Bl/√RE 3.04N/√W
• Air gap height HAG 5.5mm
• Material Ferrite

Diaphragm

• Effective diameter 170mm
• Effective area SD 227cm²
• Moving mass MMS 19.7g
• Moving mass (without air load) MMD 17.2g

Suspensions

• Stiffness KMS 3.82N/mm
• Compliance CMS 262µm/N
• Equivalent volume to the compliance VAS 18.9L
• Mechanical resistance RMS 0.36N·s/m

Dimensions

• Nominal diameter 8″
• 210mm
• Overall diameter 210mm
• Baffle cutout diameter 182mm
• Overall depth 92mm
• Flange thickness 7mm
• Mounting depth 85mm
• Volume occupied by the driver (estimated) 0.51L
• Net weight 1.06kg
• Frame material Stamped Steel