PRV Audio 4MR60-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.9dB
• Frequency response 90 - 15000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 89.9Hz
• Mechanical quality factor QMS 7.34
• Electrical quality factor QES 0.75
• Total quality factor QTS 0.68

Large signal parameters

• Maximum linear excursion xmax 2.9mm
• Air volume displaced at xmax VD 16cm³
• Power handling P 30W
• Program power Pmax 60W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.2mH
• VC Diameter 20mm
• Winding height HVC 7.5mm
• Winding material Copper Clad Aluminium
• Former material Kapton

Magnet

• Force factor Bl 3.42N/A
• Motor constant Bl/√RE 1.8N/√W
• Air gap height HAG 3.5mm

Diaphragm

• Effective diameter 85mm
• Effective area SD 57cm²
• Moving mass MMS 4.32g
• Moving mass (without air load) MMD 4g

Suspensions

• Stiffness KMS 1.38N/mm
• Compliance CMS 725µm/N
• Equivalent volume to the compliance VAS 3.26L
• Mechanical resistance RMS 0.33N·s/m

Dimensions

• Nominal diameter 4″
• 102mm
• Overall diameter 126mm
• Baffle cutout diameter 102mm
• Overall depth 60mm
• Flange thickness 4mm
• Mounting depth 56mm
• Volume occupied by the driver (estimated) 0.18L
• Net weight 0.52kg
• Frame material Stamped Steel