Eighteen Sound 15LW1401

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.7dB
• Frequency response 40 - 2400Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 39Hz
• Mechanical quality factor QMS 7.21
• Electrical quality factor QES 0.27
• Total quality factor QTS 0.26

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 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 1.02mH
• VC Diameter 100mm

Magnet

• Force factor Bl 22N/A
• Motor constant Bl/√RE 11.8N/√W

Diaphragm

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

Suspensions

• Stiffness KMS 7.52N/mm
• Compliance CMS 133µm/N
• Equivalent volume to the compliance VAS 127L
• Mechanical resistance RMS 4.25N·s/m
• Spider material Double Silicon

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