Celestion PULSE XL 15.25

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.1dB
• Frequency response 35 - 2100Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33.1Hz
• Mechanical quality factor QMS 4.23
• Electrical quality factor QES 0.53
• Total quality factor QTS 0.60

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 684cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.7Ω
• Inductance (1kHz) LE 1.32mH
• VC Diameter 63.5mm
• Winding height HVC 20mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 13.9N/A
• Motor constant Bl/√RE 5.38N/√W
• Air gap height HAG 8mm
• Height 345mm
• Material Ferrite

Diaphragm

• Effective diameter 330mm
• Effective area SD 855cm²
• Moving mass MMS 85.8g
• Moving mass (without air load) MMD 68.5g
• Material Cellulose

Suspensions

• Stiffness KMS 4.76N/mm
• Compliance CMS 210µm/N
• Equivalent volume to the compliance VAS 214L
• Mechanical resistance RMS 4.22N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 385mm
• Baffle cutout diameter 353mm
• Overall depth 168mm
• Volume occupied by the driver (estimated) 3.2L
• Net weight 5.4kg