Lii Audio Fast 6

Full-range

Nominal diameter6.5″ / 180 mm
Resonance62.9 Hz
Q factor0.46
Sensitivity91.7 dB
Linear excursion± 6 mm
Program Power50 W
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 91.7dB
  • Frequency response 75 - 20000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 62.9Hz
  • Mechanical quality factor QMS 3.82
  • Electrical quality factor QES 0.52
  • Total quality factor QTS 0.46

Large signal parameters

  • Maximum linear excursion xmax 6mm
  • Air volume displaced at xmax VD 80cm³
  • Power handling P 25W
  • Program power Pmax 50W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.4Ω
  • Inductance (1kHz, estimated) LE 0.27mH
  • VC Diameter 25mm

Magnet

  • Force factor Bl 4.26N/A
  • Motor constant Bl/√RE 2.31N/√W
  • Diameter 100mm
  • Material Ceramic Y35

Diaphragm

  • Effective diameter 130mm
  • Effective area SD 133cm²
  • Moving mass MMS 6.99g
  • Moving mass (without air load) MMD 5.8g

Suspensions

  • Stiffness KMS 1.09N/mm
  • Compliance CMS 917µm/N
  • Equivalent volume to the compliance VAS 23L
  • Mechanical resistance RMS 0.72N·s/m

Dimensions

  • Nominal diameter 6.5
  • 180mm
  • Overall diameter 180mm
  • Volume occupied by the driver (estimated) 0.62L
Lii Audio Fast 6 SPL & Impedance
Lii Audio Fast 6 Dimensions

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