PRV Audio 3MR40-NDY-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.9dB
• Frequency response 120 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 153Hz
• Mechanical quality factor QMS 3.41
• Electrical quality factor QES 0.99
• Total quality factor QTS 0.77

Large signal parameters

• Maximum linear excursion xmax 1.4mm
• Air volume displaced at xmax VD 4.7cm³
• Power handling P 20W
• Program power Pmax 40W
• Peak power Ppeak 80W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.4Ω
• Inductance (1kHz) LE 0.01mH
• VC Diameter 19mm
• Winding height HVC 4.8mm
• Winding material Copper Clad Aluminium
• Former material Polyimide

Magnet

• Force factor Bl 2.93N/A
• Motor constant Bl/√RE 1.59N/√W
• Air gap height HAG 4mm

Diaphragm

• Effective diameter 65mm
• Effective area SD 33.2cm²
• Moving mass MMS 2.62g
• Moving mass (without air load) MMD 2.5g

Suspensions

• Stiffness KMS 2.26N/mm
• Compliance CMS 443µm/N
• Equivalent volume to the compliance VAS 0.63L
• Mechanical resistance RMS 0.74N·s/m

Dimensions

• Nominal diameter 3″
• 76mm
• Overall diameter 94mm
• Baffle cutout diameter 71mm
• Overall depth 47mm
• Flange thickness 6mm
• Mounting depth 41mm
• Volume occupied by the driver (estimated) 0.11L
• Net weight 0.23kg
• Frame material Stamped Steel