Eighteen Sound 15W930

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.8dB
• Frequency response 50 - 3600Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 8.78
• Electrical quality factor QES 0.23
• Total quality factor QTS 0.22

Large signal parameters

• Maximum linear excursion xmax 7.5mm
• Air volume displaced at xmax VD 638cm³
• Power handling P 500W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 1.47mH
• VC Diameter 75mm
• Winding material Copper

Magnet

• Force factor Bl 22.1N/A
• Motor constant Bl/√RE 9.42N/√W
• Material Ferrite

Diaphragm

• Effective diameter 329mm
• Effective area SD 850cm²
• Moving mass MMS 97g
• Moving mass (without air load) MMD 79.5g
• Material Weather protected

Suspensions

• Stiffness KMS 4.17N/mm
• Compliance CMS 240µm/N
• Equivalent volume to the compliance VAS 240L
• Mechanical resistance RMS 2.29N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 393mm
• Baffle cutout diameter 360mm
• Overall depth 185mm
• Flange thickness 14mm
• Mounting depth 171mm
• Volume occupied by the driver (estimated) 4.4L
• Net weight 8.0kg