Eighteen Sound 12W750

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.5dB
• Frequency response 50 - 4600Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 55Hz
• Mechanical quality factor QMS 5.00
• Electrical quality factor QES 0.28
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 372cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.4Ω
• Inductance (1kHz) LE 0.56mH
• VC Diameter 75mm
• Winding height HVC 19mm
• Winding material Aluminum

Magnet

• Force factor Bl 15.5N/A
• Motor constant Bl/√RE 8.41N/√W
• Air gap height HAG 10mm
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 58g
• Moving mass (without air load) MMD 49.4g
• Material Weather protected

Suspensions

• Stiffness KMS 6.94N/mm
• Compliance CMS 144µm/N
• Equivalent volume to the compliance VAS 58L
• Mechanical resistance RMS 4.01N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 310mm
• Baffle cutout diameter 280mm
• Overall depth 148mm
• Flange thickness 11mm
• Mounting depth 137mm
• Volume occupied by the driver (estimated) 3.1L
• Net weight 7.5kg