PHL audio 7321Nd

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.6dB
• Frequency response 25 - 800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 34Hz
• Mechanical quality factor QMS 3.86
• Electrical quality factor QES 0.31
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 10mm
• Maximum excursion before damage xlim 21mm
• Air volume displaced at xmax VD 1250cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1.91mH
• VC Diameter 101mm
• Winding height HVC 25mm

Magnet

• Force factor Bl 28N/A
• Motor constant Bl/√RE 12.3N/√W
• Air gap height HAG 10mm
• Diameter 140mm
• Material Neodymium

Diaphragm

• Effective diameter 399mm
• Effective area SD 1250cm²
• Moving mass MMS 217g
• Moving mass (without air load) MMD 187g

Suspensions

• Stiffness KMS 10N/mm
• Compliance CMS 100µm/N
• Equivalent volume to the compliance VAS 221L
• Mechanical resistance RMS 12N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 457mm
• Baffle cutout diameter 422mm
• Overall depth 200mm
• Flange thickness 15mm
• Mounting depth 185mm
• Volume occupied by the driver 6.2L
• Net weight 7.4kg