PHL audio 4051

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.7dB
• Frequency response 50 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 49Hz
• Mechanical quality factor QMS 3.27
• Electrical quality factor QES 0.21
• Total quality factor QTS 0.20

Large signal parameters

• Maximum linear excursion xmax 5mm
• Maximum excursion before damage xlim 16mm
• Air volume displaced at xmax VD 270cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 1.13mH
• VC Diameter 77mm
• Winding height HVC 15mm

Magnet

• Force factor Bl 20.9N/A
• Motor constant Bl/√RE 8.68N/√W
• Air gap height HAG 10mm
• Diameter 204mm
• Material Ferrite

Diaphragm

• Effective diameter 262mm
• Effective area SD 539cm²
• Moving mass MMS 51g
• Moving mass (without air load) MMD 42.3g

Suspensions

• Stiffness KMS 4.76N/mm
• Compliance CMS 210µm/N
• Equivalent volume to the compliance VAS 85.2L
• Mechanical resistance RMS 4.8N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 307mm
• Baffle cutout diameter 282mm
• Overall depth 142mm
• Flange thickness 13mm
• Mounting depth 129mm
• Volume occupied by the driver 2.7L
• Net weight 8.8kg