Eighteen Sound 15W700

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.4dB
• Frequency response 38 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 41Hz
• Mechanical quality factor QMS 4.03
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 553cm³
• Power handling P 450W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 2.8Ω
• Inductance (1kHz) LE 0.54mH
• VC Diameter 75mm

Magnet

• Force factor Bl 14.7N/A
• Motor constant Bl/√RE 8.78N/√W
• Material Ferrite

Diaphragm

• Effective diameter 329mm
• Effective area SD 850cm²
• Moving mass MMS 86g
• Moving mass (without air load) MMD 68.7g
• Material Weather protected

Suspensions

• Stiffness KMS 5.71N/mm
• Compliance CMS 175µm/N
• Equivalent volume to the compliance VAS 180L
• Mechanical resistance RMS 5.5N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 387mm
• Baffle cutout diameter 353mm
• Overall depth 168mm
• Flange thickness 19mm
• Mounting depth 149mm
• Volume occupied by the driver (estimated) 4.2L
• Net weight 8.5kg