Celestion FTR15-4080HDX

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.1dB
• Frequency response 40 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 3.09
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 10.1mm
• Air volume displaced at xmax VD 864cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 1.73mH
• VC Diameter 100mm
• Winding height HVC 25mm
• Winding material Round copper
• Former material Glass fibre

Magnet

• Force factor Bl 23.1N/A
• Motor constant Bl/√RE 10.2N/√W
• Air gap height HAG 9.5mm
• Weight 3.1kg
• Material Ferrite

Diaphragm

• Effective diameter 330mm
• Effective area SD 855cm²
• Moving mass MMS 147g
• Moving mass (without air load) MMD 130g
• Material Glass loaded paper (weather-resistant)

Suspensions

• Stiffness KMS 9.09N/mm
• Compliance CMS 110µm/N
• Equivalent volume to the compliance VAS 111L
• Mechanical resistance RMS 13.8N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 385mm
• Baffle cutout diameter 351mm
• Overall depth 180mm
• Volume occupied by the driver (estimated) 4.8L
• Net weight 9.7kg
• Frame material Cast aluminium