ETON Symphony II 3-212/C8/25 HEX

Mid Bass

Nominal diameter5″ / 122 mm
Resonance57 Hz
Q factor0.39
Sensitivity85.8 dB
Linear excursion± 5.5 mm
Program Power100 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 85.8dB
  • Frequency response 100 - 5400Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 57Hz
  • Mechanical quality factor QMS 5.09
  • Electrical quality factor QES 0.43
  • Total quality factor QTS 0.39

Large signal parameters

  • Maximum linear excursion xmax 5.5mm
  • Air volume displaced at xmax VD 30cm³
  • Power handling P 50W
  • Program power Pmax 100W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.9Ω
  • Inductance (1kHz) LE 0.4mH
  • VC Diameter 25mm
  • Winding material Copper
  • Former material Kapton

Magnet

  • Flux density B 1.15T
  • Force factor Bl 5.8N/A
  • Motor constant Bl/√RE 2.39N/√W
  • Air gap height HAG 6mm
  • Diameter 90mm
  • Height 17mm
  • Material Ferrite

Diaphragm

  • Effective diameter 84mm
  • Effective area SD 55cm²
  • Moving mass MMS 6.2g
  • Moving mass (without air load) MMD 5.9g

Suspensions

  • Stiffness KMS 1.19N/mm
  • Compliance CMS 840µm/N
  • Equivalent volume to the compliance VAS 3.6L
  • Mechanical resistance RMS 0.58N·s/m

Dimensions

  • Nominal diameter 5
  • 122mm
  • Overall diameter 122mm
  • Baffle cutout diameter 96mm
  • Overall depth 66mm
  • Flange thickness 6mm
  • Mounting depth 60mm
  • Volume occupied by the driver (estimated) 0.31L
  • Net weight 1.2kg
ETON 3-212/C8/25 HEX Impedance
ETON 3-212/C8/25 HEX SPL
ETON 3-212/C8/25 HEX Dimensions

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