Radian 5208C

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.4dB
• Frequency response 60 - 25000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 90Hz
• Mechanical quality factor QMS 6.80
• Electrical quality factor QES 0.66
• Total quality factor QTS 0.61

Large signal parameters

• Maximum linear excursion xmax 3.5mm
• Air volume displaced at xmax VD 77cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.9Ω
• Inductance (1kHz) LE 0.7mH
• VC Diameter 51mm
• Winding height HVC 11mm
• Winding material Copper Clad Aluminum
• Former material Fiberglass

Magnet

• Force factor Bl 10.1N/A
• Motor constant Bl/√RE 4.16N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 168mm
• Effective area SD 221cm²
• Moving mass MMS 19.9g
• Moving mass (without air load) MMD 17.5g
• Material Paper/Kevlar composite

Suspensions

• Stiffness KMS 6.45N/mm
• Compliance CMS 155µm/N
• Equivalent volume to the compliance VAS 10.8L
• Mechanical resistance RMS 1.65N·s/m

Dimensions

• Nominal diameter 8″
• 205mm
• Overall diameter 210mm
• Baffle cutout diameter 190mm
• Overall depth 131mm
• Volume occupied by the driver (estimated) 1.4L
• Net weight 3.7kg
• Frame material Cast Aluminum