PHL audio 3840NdU

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.7dB
• Frequency response 60 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 62Hz
• Mechanical quality factor QMS 5.01
• Electrical quality factor QES 0.23
• Total quality factor QTS 0.22

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Maximum excursion before damage xlim 12mm
• Air volume displaced at xmax VD 160cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 1.06mH
• VC Diameter 77mm
• Winding height HVC 15mm

Magnet

• Force factor Bl 20.8N/A
• Motor constant Bl/√RE 8.79N/√W
• Air gap height HAG 10mm
• Diameter 138mm
• Material Neodymium

Diaphragm

• Effective diameter 213mm
• Effective area SD 356cm²
• Moving mass MMS 45g
• Moving mass (without air load) MMD 40.2g

Suspensions

• Stiffness KMS 6.67N/mm
• Compliance CMS 150µm/N
• Equivalent volume to the compliance VAS 26.3L
• Mechanical resistance RMS 3.5N·s/m

Dimensions

• Nominal diameter 10″
• 250mm
• Overall diameter 255mm
• Baffle cutout diameter 229mm
• Overall depth 137mm
• Flange thickness 11mm
• Mounting depth 126mm
• Volume occupied by the driver 1.2L
• Net weight 5.3kg