Celestion PULSE XL 12.20

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92dB
• Frequency response 35 - 2200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35.1Hz
• Mechanical quality factor QMS 6.09
• Electrical quality factor QES 0.55
• Total quality factor QTS 0.50

Large signal parameters

• Maximum linear excursion xmax 8.3mm
• Air volume displaced at xmax VD 438cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 1.31mH
• VC Diameter 50mm
• Winding height HVC 20.5mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 11.2N/A
• Motor constant Bl/√RE 4.65N/√W
• Air gap height HAG 8mm
• Height 36mm
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 53.6g
• Moving mass (without air load) MMD 45g
• Material Cellulose

Suspensions

• Stiffness KMS 2.6N/mm
• Compliance CMS 384µm/N
• Equivalent volume to the compliance VAS 153L
• Mechanical resistance RMS 1.94N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 12″
• 305mm
• Overall depth 135mm
• Flange thickness 44mm
• Mounting depth 91mm
• Volume occupied by the driver (estimated) 2.1L
• Net weight 4.1kg