PRV Audio 4MR60-NDY-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86dB
• Frequency response 90 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 95.6Hz
• Mechanical quality factor QMS 4.74
• Electrical quality factor QES 1.04
• Total quality factor QTS 0.85

Large signal parameters

• Maximum linear excursion xmax 1.4mm
• Air volume displaced at xmax VD 7.8cm³
• Power handling P 30W
• Program power Pmax 60W
• Peak power Ppeak 120W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.3Ω
• Inductance (1kHz) LE 0.051mH
• VC Diameter 19mm
• Winding height HVC 4.8mm
• Winding material Copper Clad Aluminium
• Former material Polyimide

Magnet

• Force factor Bl 2.82N/A
• Motor constant Bl/√RE 1.55N/√W
• Air gap height HAG 4mm

Diaphragm

• Effective diameter 84mm
• Effective area SD 55.4cm²
• Moving mass MMS 4.17g
• Moving mass (without air load) MMD 3.8g

Suspensions

• Stiffness KMS 1.51N/mm
• Compliance CMS 664µm/N
• Equivalent volume to the compliance VAS 2.85L
• Mechanical resistance RMS 0.53N·s/m

Dimensions

• Nominal diameter 4″
• 102mm
• Overall diameter 128mm
• Baffle cutout diameter 93mm
• Overall depth 50mm
• Flange thickness 5mm
• Mounting depth 45mm
• Volume occupied by the driver (estimated) 0.18L
• Net weight 0.25kg
• Frame material Stamped Steel