Eighteen Sound 10NMB520

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.5dB
• Frequency response 60 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 64Hz
• Mechanical quality factor QMS 4.00
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 136cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 16Ω
• DC resistance RE 11.7Ω
• Inductance (1kHz) LE 0.33mH
• Winding material Aluminum

Magnet

• Force factor Bl 17.5N/A
• Motor constant Bl/√RE 5.12N/√W
• Material Neodymium

Diaphragm

• Effective diameter 208mm
• Effective area SD 340cm²
• Moving mass MMS 23g
• Moving mass (without air load) MMD 18.4g
• Material Weather protected

Suspensions

• Stiffness KMS 3.72N/mm
• Compliance CMS 269µm/N
• Equivalent volume to the compliance VAS 43L
• Mechanical resistance RMS 2.31N·s/m

Dimensions

• Nominal diameter 10″
• 260mm
• Overall diameter 260mm
• Baffle cutout diameter 232mm
• Overall depth 104mm
• Flange thickness 14mm
• Mounting depth 90mm
• Volume occupied by the driver (estimated) 1.2L
• Net weight 3.0kg