Eighteen Sound 15LW1401 8Ω

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.9dB
• Frequency response 40 - 2400Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 42Hz
• Mechanical quality factor QMS 5.36
• Electrical quality factor QES 0.28
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 9mm
• Air volume displaced at xmax VD 765cm³
• Power handling P 1000W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.0Ω
• Inductance (1kHz) LE 2.15mH
• VC Diameter 100mm
• Winding material Copper

Magnet

• Force factor Bl 24.2N/A
• Motor constant Bl/√RE 10.8N/√W
• Material Ferrite

Diaphragm

• Effective diameter 329mm
• Effective area SD 850cm²
• Moving mass MMS 125g
• Moving mass (without air load) MMD 108g
• Material Weather protected

Suspensions

• Stiffness KMS 8.7N/mm
• Compliance CMS 115µm/N
• Equivalent volume to the compliance VAS 131L
• Mechanical resistance RMS 6.15N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 387mm
• Baffle cutout diameter 353mm
• Overall depth 163mm
• Flange thickness 19mm
• Mounting depth 144mm
• Volume occupied by the driver (estimated) 5.4L
• Net weight 12.9kg