PHL audio 4071NdU-19

• Sensitivity (1W, 1m, infinite baffle)SPL1W96.2dB
• Frequency response50 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air)fS46Hz
• Mechanical quality factorQMS4.99
• Electrical quality factorQES0.18
• Total quality factorQTS0.18

Large signal parameters

• Maximum linear excursionxmax6.5mm
• Maximum excursion before damagexlim16mm
• Air volume displaced at xmaxVD320cm³
• Power handlingP400W
• Program powerPmax800W

Voice Coil

• Nominal impedanceZ8Ω
• DC resistanceRE5.0Ω
• Inductance (1kHz)LE1.29mH
• VC Diameter77mm
• Winding heightHVC17.5mm

Magnet

• Force factorBl23.3N/A
• Motor constantBl/√RE10.4N/√W
• Air gap heightHAG10mm
• Diameter140mm
• MaterialNeodymium

Diaphragm

• Effective diameter251mm
• Effective areaSD493cm²
• Moving massMMS69g
• Moving mass (without air load)MMD61.1g

Suspensions

• StiffnessKMS5.88N/mm
• ComplianceCMS170µm/N
• Equivalent volume to the complianceVAS59.7L
• Mechanical resistanceRMS4N·s/m

Dimensions

• Nominal diameter12″
• 300mm
• Overall diameter307mm
• Baffle cutout diameter282mm
• Overall depth155mm
• Flange thickness13mm
• Mounting depth142mm
• Volume occupied by the driver2.1L
• Net weight6.5kg