Celestion CF1025BMB

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.8dB
• Frequency response 45 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40.9Hz
• Mechanical quality factor QMS 7.95
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.36

Large signal parameters

• Maximum linear excursion xmax 6.7mm
• Air volume displaced at xmax VD 230cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 1.15mH
• VC Diameter 64mm
• Winding height HVC 17.3mm
• Winding material Round copper
• Former material Polyimide

Magnet

• Force factor Bl 15.3N/A
• Motor constant Bl/√RE 6.22N/√W
• Air gap height HAG 8mm
• Weight 1.42kg
• Material Ferrite

Diaphragm

• Effective diameter 210mm
• Effective area SD 346cm²
• Moving mass MMS 55.9g
• Moving mass (without air load) MMD 51.1g
• Material Glass loaded paper (weather-resistant)

Suspensions

• Stiffness KMS 3.69N/mm
• Compliance CMS 271µm/N
• Equivalent volume to the compliance VAS 46.1L
• Mechanical resistance RMS 1.8N·s/m
• Surround material Elastomer

Dimensions

• Nominal diameter 10″
• 254mm
• Overall diameter 265mm
• Baffle cutout diameter 234mm
• Overall depth 125mm
• Volume occupied by the driver (estimated) 1.8L
• Net weight 4.3kg
• Frame material Cast aluminium