Celestion Truvox 1525

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.2dB
• Frequency response 40 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 49Hz
• Mechanical quality factor QMS 12.92
• Electrical quality factor QES 0.80
• Total quality factor QTS 0.76

Large signal parameters

• Maximum linear excursion xmax 4.8mm
• Air volume displaced at xmax VD 406cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.6Ω
• Inductance (1kHz) LE 0.703mH
• VC Diameter 64mm
• Winding height HVC 13.5mm
• Winding material Copper clad aluminium
• Former material Polyimide

Magnet

• Force factor Bl 14.3N/A
• Motor constant Bl/√RE 5.56N/√W
• Air gap height HAG 8mm
• Weight 1.42kg
• Material Ferrite

Diaphragm

• Effective diameter 330mm
• Effective area SD 855cm²
• Moving mass MMS 80.8g
• Moving mass (without air load) MMD 63.5g
• Material Glass loaded cellulose

Suspensions

• Stiffness KMS 7.63N/mm
• Compliance CMS 131µm/N
• Equivalent volume to the compliance VAS 135L
• Mechanical resistance RMS 1.92N·s/m
• Surround material Triple roll, cloth sealed

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 384mm
• Baffle cutout diameter 352mm
• Overall depth 152mm
• Volume occupied by the driver (estimated) 2.7L
• Net weight 4.71kg
• Frame material Pressed steel