Lii Audio ST-5

Full-range

Nominal diameter5″ / 152 mm
Resonance55.8 Hz
Q factor0.66
Sensitivity87.4 dB
Linear excursion± 4 mm
Program Power40 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 87.4dB
  • Frequency response 56 - 20000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 55.8Hz
  • Mechanical quality factor QMS 2.91
  • Electrical quality factor QES 0.86
  • Total quality factor QTS 0.66

Large signal parameters

  • Maximum linear excursion xmax 4mm
  • Air volume displaced at xmax VD 43cm³
  • Power handling P 20W
  • Program power Pmax 40W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 7.3Ω
  • Inductance (1kHz, estimated) LE 0.7mH
  • VC Diameter 25mm

Magnet

  • Force factor Bl 5.83N/A
  • Motor constant Bl/√RE 2.16N/√W
  • Diameter 110mm
  • Material Ceramic Y35

Diaphragm

  • Effective diameter 117mm
  • Effective area SD 108cm²
  • Moving mass MMS 9.11g
  • Moving mass (without air load) MMD 8.3g
  • Material Aluminum

Suspensions

  • Stiffness KMS 1.74N/mm
  • Compliance CMS 574µm/N
  • Equivalent volume to the compliance VAS 14.3L
  • Mechanical resistance RMS 1.1N·s/m

Dimensions

  • Nominal diameter 5
  • 152mm
  • Overall diameter 152mm
  • Volume occupied by the driver (estimated) 0.4L
Lii Audio ST-5 SPL & Impedance
Lii Audio ST-5 Dimensions

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