Eighteen Sound 18W2001

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.5dB
• Frequency response 37 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 37Hz
• Mechanical quality factor QMS 7.29
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.25

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 794cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 1.9mH
• VC Diameter 100mm

Magnet

• Force factor Bl 27.1N/A
• Motor constant Bl/√RE 11.3N/√W
• Material Ferrite

Diaphragm

• Effective diameter 380mm
• Effective area SD 1134cm²
• Moving mass MMS 143g
• Moving mass (without air load) MMD 116g

Suspensions

• Stiffness KMS 7.75N/mm
• Compliance CMS 129µm/N
• Equivalent volume to the compliance VAS 230L
• Mechanical resistance RMS 4.56N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 462mm
• Baffle cutout diameter 416mm
• Overall depth 205mm
• Flange thickness 19mm
• Mounting depth 186mm
• Volume occupied by the driver (estimated) 6.5L
• Net weight 11.5kg