Eighteen Sound 15NW530

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.4dB
• Frequency response 47 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38Hz
• Mechanical quality factor QMS 5.81
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 7.5mm
• Air volume displaced at xmax VD 641cm³
• Power handling P 500W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 1.4mH
• VC Diameter 75mm
• Winding material Copper

Magnet

• Force factor Bl 22N/A
• Motor constant Bl/√RE 9.56N/√W
• Material Neodymium

Diaphragm

• Effective diameter 330mm
• Effective area SD 855cm²
• Moving mass MMS 135g
• Moving mass (without air load) MMD 118g
• Material Weather protected

Suspensions

• Stiffness KMS 7.69N/mm
• Compliance CMS 130µm/N
• Equivalent volume to the compliance VAS 154L
• Mechanical resistance RMS 5.55N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 387mm
• Baffle cutout diameter 353mm
• Overall depth 169mm
• Flange thickness 11mm
• Mounting depth 158mm
• Volume occupied by the driver (estimated) 2.8L
• Net weight 4.4kg