Eighteen Sound 12NW350

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.7dB
• Frequency response 50 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 54Hz
• Mechanical quality factor QMS 12.00
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 8.3mm
• Air volume displaced at xmax VD 441cm³
• Power handling P 800W
• Program power Pmax 1600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.0Ω
• Inductance (1kHz) LE 0.85mH
• VC Diameter 88mm
• Winding height HVC 22mm

Magnet

• Force factor Bl 19.2N/A
• Motor constant Bl/√RE 8.59N/√W
• Air gap height HAG 11mm

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 75g
• Moving mass (without air load) MMD 66.4g
• Material Reinforced, water repellent

Suspensions

• Stiffness KMS 8.62N/mm
• Compliance CMS 116µm/N
• Equivalent volume to the compliance VAS 46L
• Mechanical resistance RMS 2.12N·s/m

Dimensions

• Nominal diameter 12″
• 310mm
• Overall diameter 310mm
• Baffle cutout diameter 283mm
• Overall depth 150mm
• Flange thickness 13mm
• Mounting depth 137mm
• Volume occupied by the driver (estimated) 2.5L
• Net weight 5.1kg