PHL audio 1660NdM

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.9dB
• Frequency response 300 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 125Hz
• Mechanical quality factor QMS 4.08
• Electrical quality factor QES 0.34
• Total quality factor QTS 0.31

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Maximum excursion before damage xlim 3mm
• Air volume displaced at xmax VD 38cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 0.746mH
• VC Diameter 51mm
• Winding height HVC 11mm

Magnet

• Force factor Bl 12.5N/A
• Motor constant Bl/√RE 5.48N/√W
• Air gap height HAG 8mm
• Diameter 98mm
• Material Neodymium

Diaphragm

• Effective diameter 138mm
• Effective area SD 150cm²
• Moving mass MMS 13g
• Moving mass (without air load) MMD 11.7g

Suspensions

• Stiffness KMS 8.33N/mm
• Compliance CMS 120µm/N
• Equivalent volume to the compliance VAS 4L
• Mechanical resistance RMS 2.5N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 163mm
• Baffle cutout diameter 146mm
• Overall depth 71mm
• Flange thickness 8mm
• Mounting depth 63mm
• Volume occupied by the driver 0.4L
• Net weight 1.5kg