Fountek FW168K

8Ω

Mid Bass

Nominal diameter6.5″ / 168 mm
Resonance48.6 Hz
Q factor0.43
Sensitivity86.9 dB
Linear excursion± 5 mm
Program power100 W
Fountek FW168K Mid BassFountek FW168K Mid BassFountek FW168K Mid Bass
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone burst
Frequency
Hz
Impedance
Ω
Impedance phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical phase
°
Group delay
ms
Transient response
ms
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Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 86.9dB
  • Frequency response 70 - 4500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 48.6Hz
  • Mechanical quality factor QMS 2.32
  • Electrical quality factor QES 0.52
  • Total quality factor QTS 0.43

Large signal parameters

  • Maximum linear excursion (one way) xmax 5mm
  • Air volume displaced at xmax VD 62cm³
  • Power handling P 50W
  • Program power Pmax 100W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 6.8Ω
  • Inductance (1kHz, estimated) LE 0.94mH
  • VC Diameter 35.5mm
  • Winding height HVC 15mm
  • Winding material Copper
  • Former material Black Aluminum

Magnet

  • Flux density B 1T
  • Force factor Bl 7.9N/A
  • Motor constant Bl/√RE 3.03N/√W
  • Air gap height HAG 5mm
  • Material Ferrite

Diaphragm

  • Effective diameter 126mm
  • Effective area SD 125cm²
  • Moving mass (including air load) MMS 15.7g
  • Moving mass MMD 14.5g

Suspensions

  • Stiffness KMS 1.46N/mm
  • Compliance CMS 684µm/N
  • Equivalent volume to the compliance VAS 15.1L
  • Mechanical resistance RMS 2.06N·s/m

Dimensions

  • Nominal diameter 6.5″
  • 168mm
  • Overall diameter 182mm
  • Overall depth 87mm
  • Volume occupied by the driver (estimated) 0.55L
  • Net weight 1.45kg
SPL & Impedance
Fountek FW168K SPL & Impedance
Fountek FW168K Dimensions

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