SUPRAVOX 215 Signature Bi-cone

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.9dB
• Frequency response 45 - 19000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 50Hz
• Mechanical quality factor QMS 8.00
• Electrical quality factor QES 0.90
• Total quality factor QTS 0.80

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 105cm³
• Power handling P 35W
• Program power Pmax 70W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz, estimated) LE 0.56mH

Magnet

• Flux density B 1.2T
• Force factor Bl 4.4N/A
• Motor constant Bl/√RE 1.88N/√W
• Diameter 120mm

Diaphragm

• Effective diameter 183mm
• Effective area SD 263cm²
• Moving mass MMS 10g
• Moving mass (without air load) MMD 6.9g

Suspensions

• Stiffness KMS 1.25N/mm
• Compliance CMS 800µm/N
• Equivalent volume to the compliance VAS 85L
• Mechanical resistance RMS 0.39N·s/m
• Surround material Paper

Dimensions

• Nominal diameter 8″
• 215mm
• Overall diameter 224mm
• Baffle cutout diameter 212mm
• Overall depth 105mm
• Flange thickness 10mm
• Mounting depth 95mm
• Volume occupied by the driver (estimated) 1L
• Frame material Aluminium