Celestion CF1025C

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.7dB
• Frequency response 60 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 54.8Hz
• Mechanical quality factor QMS 2.34
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 4.3mm
• Air volume displaced at xmax VD 147cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 0.57mH
• VC Diameter 64mm
• Winding height HVC 12.5mm
• Winding material Edgewound copper clad aluminium
• Former material Glass fibre

Magnet

• Force factor Bl 14.8N/A
• Motor constant Bl/√RE 6.53N/√W
• Air gap height HAG 8mm
• Weight 1.7kg
• Material Ferrite

Diaphragm

• Effective diameter 210mm
• Effective area SD 346cm²
• Moving mass MMS 37g
• Moving mass (without air load) MMD 32.3g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 4.35N/mm
• Compliance CMS 230µm/N
• Equivalent volume to the compliance VAS 38.6L
• Mechanical resistance RMS 5.46N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 10″
• 254mm
• Overall diameter 265mm
• Baffle cutout diameter 231mm
• Overall depth 119mm
• Volume occupied by the driver (estimated) 1.9L
• Net weight 4.9kg
• Frame material Cast aluminium