Celestion BL15-300X (4)

Bass Guitar Speaker

Nominal diameter15″ / 381 mm
Resonance48.1 Hz
Q factor0.75
Sensitivity93.1 dB
Linear excursion± 4.3 mm
Program Power600 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 93.1dB
  • Frequency response 42 - 3500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 48.1Hz
  • Mechanical quality factor QMS 2.99
  • Electrical quality factor QES 1.00
  • Total quality factor QTS 0.75

Large signal parameters

  • Maximum linear excursion xmax 4.3mm
  • Air volume displaced at xmax VD 364cm³
  • Power handling P 300W
  • Program power Pmax 600W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.2Ω
  • Inductance (1kHz) LE 0.45mH
  • VC Diameter 63.5mm
  • Winding height HVC 16.5mm
  • Winding material Copper
  • Former material Polyimide

Magnet

  • Force factor Bl 8.83N/A
  • Motor constant Bl/√RE 4.98N/√W
  • Air gap height HAG 8mm
  • Height 46mm
  • Material Ferrite

Diaphragm

  • Effective diameter 330mm
  • Effective area SD 855cm²
  • Moving mass MMS 83.4g
  • Moving mass (without air load) MMD 66.1g
  • Material Kevlar loaded paper

Suspensions

  • Stiffness KMS 7.52N/mm
  • Compliance CMS 133µm/N
  • Equivalent volume to the compliance VAS 138L
  • Mechanical resistance RMS 8.33N·s/m
  • Surround material Cloth-sealed

Dimensions

  • Nominal diameter 15
  • 381mm
  • Overall diameter 385mm
  • Baffle cutout diameter 351mm
  • Overall depth 162mm
  • Volume occupied by the driver (estimated) 2.9L
  • Net weight 4.8kg
Celestion BL15-300X (4) SPL & Impedance


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