Celestion TSQ2145

Low frequency

Nominal diameter21″ / 530 mm
Resonance30 Hz
Q factor0.34
Sensitivity94.2 dB
Linear excursion± 15 mm
Program Power3600 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
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 94.2dB
  • Frequency response 30 - 1000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 30Hz
  • Mechanical quality factor QMS 8.39
  • Electrical quality factor QES 0.36
  • Total quality factor QTS 0.34

Large signal parameters

  • Maximum linear excursion xmax 15mm
  • Maximum excursion before damage xlim 40mm
  • Air volume displaced at xmax VD 2493cm³
  • Power handling P 1800W
  • Program power Pmax 3600W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.0Ω
  • Inductance (1kHz) LE 3.91mH
  • VC Diameter 115mm
  • Winding height HVC 36mm
  • Winding material Round copper
  • Former material Glass fibre

Magnet

  • Force factor Bl 33.8N/A
  • Motor constant Bl/√RE 15.1N/√W
  • Air gap height HAG 12mm
  • Material Neodymium

Diaphragm

  • Effective diameter 460mm
  • Effective area SD 1662cm²
  • Moving mass MMS 435g
  • Moving mass (without air load) MMD 388g
  • Material Glass loaded cellulose, water-resistant

Suspensions

  • Stiffness KMS 15.4N/mm
  • Compliance CMS 65µm/N
  • Equivalent volume to the compliance VAS 254L
  • Mechanical resistance RMS 9.77N·s/m
  • Surround material Triple roll, cloth sealed

Dimensions

  • Nominal diameter 21
  • 530mm
  • Overall diameter 541mm
  • Baffle cutout diameter 505mm
  • Overall depth 250mm
  • Flange thickness 17mm
  • Mounting depth 233mm
  • Volume occupied by the driver (estimated) 9.3L
  • Net weight 13.8kg
  • Frame material Cast aluminium
Celestion TSQ2145 SPL & Impedance
Celestion TSQ2145 Stiffness


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