Celestion NTR10-2520E

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.2dB
• Frequency response 50 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 55.8Hz
• Mechanical quality factor QMS 3.24
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.31

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 173cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.68mH
• VC Diameter 64mm
• Winding height HVC 17.5mm
• Winding material Round copper
• Former material Glass fibre

Magnet

• Force factor Bl 15.9N/A
• Motor constant Bl/√RE 6.83N/√W
• Air gap height HAG 8mm
• Material Neodymium

Diaphragm

• Effective diameter 210mm
• Effective area SD 346cm²
• Moving mass MMS 46g
• Moving mass (without air load) MMD 41.3g
• Material Kevlar loaded paper

Suspensions

• Stiffness KMS 5.56N/mm
• Compliance CMS 180µm/N
• Equivalent volume to the compliance VAS 30.1L
• Mechanical resistance RMS 4.97N·s/m
• Surround material Cloth-sealed

Dimensions

• Nominal diameter 10″
• 254mm
• Overall diameter 260mm
• Baffle cutout diameter 232mm
• Overall depth 113mm
• Volume occupied by the driver (estimated) 1.1L
• Net weight 2.2kg
• Frame material Cast aluminium