HELIX IK W6

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.3dB

Thiele & Small parameters

• Resonance frequency (free air) fS 50Hz
• Mechanical quality factor QMS 3.92
• Electrical quality factor QES 0.32
• Total quality factor QTS 0.30

Large signal parameters

• Maximum linear excursion xmax 6mm
• Air volume displaced at xmax VD 74cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 4.2Ω
• Inductance (1kHz, in series, estimated) LE 1.03mH
• VC Diameter 37mm
• Winding height HVC 18mm

Magnet

• Force factor (in series) Bl 12.3N/A
• Motor constant Bl/√RE 6N/√W

Diaphragm

• Effective diameter 125mm
• Effective area SD 123cm²
• Moving mass MMS 37g
• Moving mass (without air load) MMD 36g

Suspensions

• Stiffness KMS 3.83N/mm
• Compliance CMS 261µm/N
• Equivalent volume to the compliance VAS 5.3L
• Mechanical resistance RMS 3.04N·s/m

Dimensions

• Nominal diameter 6.5″
• 160mm
• Overall diameter 164mm
• Baffle cutout diameter 133mm
• Mounting depth 74mm
• Volume occupied by the driver (estimated) 0.49L