HELIX COMPOSE Ci7 W200FM-S3

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.4dB
• Frequency response 35 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 52Hz
• Mechanical quality factor QMS 6.04
• Electrical quality factor QES 0.78
• Total quality factor QTS 0.69

Large signal parameters

• Maximum linear excursion xmax 3.9mm
• Air volume displaced at xmax VD 78cm³
• Power handling P 150W
• Program power Pmax 225W

Voice Coil

• Nominal impedance Z 3Ω
• DC resistance RE 3.0Ω
• Inductance (1kHz, estimated) LE 0.58mH
• VC Diameter 37mm
• Winding height HVC 13.8mm

Magnet

• Force factor Bl 5.6N/A
• Motor constant Bl/√RE 3.23N/√W

Diaphragm

• Effective diameter 160mm
• Effective area SD 201cm²
• Moving mass MMS 25.6g
• Moving mass (without air load) MMD 23.6g

Suspensions

• Stiffness KMS 2.7N/mm
• Compliance CMS 370µm/N
• Equivalent volume to the compliance VAS 20.8L
• Mechanical resistance RMS 1.4N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 195mm
• Baffle cutout diameter 174mm
• Mounting depth 66mm
• Volume occupied by the driver (estimated) 0.77L