HELIX Q 15W

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.4dB

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 4.62
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.41

Large signal parameters

• Maximum linear excursion xmax 14mm
• Air volume displaced at xmax VD 1147cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.9Ω
• Inductance (1kHz, in series, estimated) LE 4.4mH
• VC Diameter 76mm
• Winding height HVC 40mm

Magnet

• Force factor (in series) Bl 24.8N/A
• Motor constant Bl/√RE 12.6N/√W

Diaphragm

• Effective diameter 323mm
• Effective area SD 819cm²
• Moving mass MMS 366g
• Moving mass (without air load) MMD 349g
• Material Non-pressed paper cone

Suspensions

• Stiffness KMS 14.7N/mm
• Compliance CMS 68µm/N
• Equivalent volume to the compliance VAS 65.2L
• Mechanical resistance RMS 15N·s/m

Dimensions

• Nominal diameter 15″
• 396mm
• Overall diameter 396mm
• Baffle cutout diameter 348mm
• Mounting depth 198mm
• Volume occupied by the driver (estimated) 4.8L