PHL audio 3920NdU-7

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.6dB
• Frequency response 60 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 74Hz
• Mechanical quality factor QMS 4.62
• Electrical quality factor QES 0.21
• Total quality factor QTS 0.20

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Maximum excursion before damage xlim 12mm
• Air volume displaced at xmax VD 139cm³
• Power handling P 450W
• Program power Pmax 900W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 1.07mH
• VC Diameter 77mm
• Winding height HVC 15mm

Magnet

• Force factor Bl 20.7N/A
• Motor constant Bl/√RE 8.91N/√W
• Air gap height HAG 10mm
• Diameter 141mm
• Material Neodymium

Diaphragm

• Effective diameter 198mm
• Effective area SD 308cm²
• Moving mass MMS 35.2g
• Moving mass (without air load) MMD 31.1g

Suspensions

• Stiffness KMS 7.69N/mm
• Compliance CMS 130µm/N
• Equivalent volume to the compliance VAS 17.7L
• Mechanical resistance RMS 3.54N·s/m

Dimensions

• Nominal diameter 10″
• 250mm
• Overall diameter 255mm
• Baffle cutout diameter 229mm
• Overall depth 143mm
• Flange thickness 11mm
• Mounting depth 132mm
• Volume occupied by the driver 1.5L
• Net weight 5.5kg