Celestion Truvox 1225

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94dB

Thiele & Small parameters

• Resonance frequency (free air) fS 60.3Hz
• Mechanical quality factor QMS 7.39
• Electrical quality factor QES 0.68
• Total quality factor QTS 0.62

Large signal parameters

• Maximum linear excursion xmax 4.8mm
• Air volume displaced at xmax VD 252cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.4Ω
• Inductance (1kHz) LE 0.68mH
• VC Diameter 64mm
• Winding height HVC 14.3mm
• Winding material Copper clad aluminium
• Former material Polyimide

Magnet

• Force factor Bl 13.5N/A
• Motor constant Bl/√RE 5.35N/√W
• Air gap height HAG 9.5mm
• Weight 1.42kg
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 51.4g
• Moving mass (without air load) MMD 42.9g

Suspensions

• Stiffness KMS 7.14N/mm
• Compliance CMS 140µm/N
• Equivalent volume to the compliance VAS 54.2L
• Mechanical resistance RMS 2.63N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 306mm
• Baffle cutout diameter 285mm
• Overall depth 131mm
• Volume occupied by the driver (estimated) 2.1L
• Net weight 4.7kg
• Frame material Pressed Steel