Eighteen Sound 15NCX1000

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.6dB
• Frequency response 44 - 3600Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 53Hz
• Mechanical quality factor QMS 10.40
• Electrical quality factor QES 0.32
• Total quality factor QTS 0.31

Large signal parameters

• Maximum linear excursion xmax 7.5mm
• Air volume displaced at xmax VD 661cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 1.4mH
• VC Diameter 100mm
• Winding material CCAW Aluminum

Magnet

• Force factor Bl 27.5N/A
• Motor constant Bl/√RE 11N/√W

Diaphragm

• Effective diameter 335mm
• Effective area SD 881cm²
• Moving mass MMS 110g
• Moving mass (without air load) MMD 91.8g
• Material Water repellent

Suspensions

• Stiffness KMS 12.2N/mm
• Compliance CMS 82µm/N
• Equivalent volume to the compliance VAS 75L
• Mechanical resistance RMS 3.52N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 393mm
• Baffle cutout diameter 354mm
• Overall depth 197mm
• Flange thickness 12mm
• Mounting depth 185mm
• Volume occupied by the driver (estimated) 4.7L
• Net weight 8.5kg