Eighteen Sound 15W1301

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.2dB
• Frequency response 39 - 2800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 48Hz
• Mechanical quality factor QMS 8.50
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 6mm
• Maximum excursion before damage xlim 19.5mm
• Air volume displaced at xmax VD 540cm³
• Power handling P 800W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 1.55mH
• VC Diameter 100mm
• Winding material Aluminum

Magnet

• Force factor Bl 22.3N/A
• Motor constant Bl/√RE 9.51N/√W
• Material Ferrite

Diaphragm

• Effective diameter 339mm
• Effective area SD 900cm²
• Moving mass MMS 99g
• Moving mass (without air load) MMD 80.7g

Suspensions

• Stiffness KMS 9.35N/mm
• Compliance CMS 107µm/N
• Equivalent volume to the compliance VAS 123L
• Mechanical resistance RMS 3.51N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 387mm
• Baffle cutout diameter 357mm
• Overall depth 161mm
• Flange thickness 20mm
• Mounting depth 141mm
• Volume occupied by the driver (estimated) 5.2L
• Net weight 12.3kg