Tectonic TEBM65C20F-4

Full-range

Nominal diameter4.5″ / 108 mm
Resonance97 Hz
Q factor0.83
Sensitivity81.8 dB
Program Power60 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 81.8dB
  • Frequency response 60 - 20000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 97Hz
  • Mechanical quality factor QMS 7.00
  • Electrical quality factor QES 0.94
  • Total quality factor QTS 0.83

Large signal parameters

  • Power handling P 30W
  • Program power Pmax 60W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.8Ω
  • Inductance (1kHz) LE 0.03mH
  • VC Diameter 25.4mm

Magnet

  • Force factor Bl 3.75N/A
  • Motor constant Bl/√RE 1.92N/√W
  • Material Ferrite

Diaphragm

  • Effective diameter 69mm
  • Effective area SD 37.2cm²
  • Moving mass MMS 5.6g
  • Moving mass (without air load) MMD 5.4g

Suspensions

  • Stiffness KMS 2.13N/mm
  • Compliance CMS 470µm/N
  • Equivalent volume to the compliance VAS 0.99L
  • Mechanical resistance RMS 0.51N·s/m

Dimensions

  • Nominal diameter 4.5
  • 108mm
  • Overall diameter 108mm
  • Baffle cutout diameter 83mm
  • Overall depth 53mm
  • Volume occupied by the driver (estimated) 0.18L
  • Net weight 0.685kg
Tectonic TEBM65C20F-4 Dimensions

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