P.Audio GM18-100F

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.9dB
• Frequency response 30 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 36Hz
• Mechanical quality factor QMS 9.90
• Electrical quality factor QES 0.48
• Total quality factor QTS 0.45

Large signal parameters

• Maximum linear excursion xmax 8.3mm
• Air volume displaced at xmax VD 1011cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1mH
• VC Diameter 101.6mm
• Winding height HVC 31.5mm
• Winding material Round Copper Wire
• Former material Glass fiber

Magnet

• Flux density B 1T
• Force factor Bl 24N/A
• Motor constant Bl/√RE 10.5N/√W
• Air gap height HAG 15mm
• Material Ferrite

Diaphragm

• Effective diameter 392mm
• Effective area SD 1225cm²
• Moving mass MMS 232g
• Moving mass (without air load) MMD 202g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 12.3N/mm
• Compliance CMS 81µm/N
• Equivalent volume to the compliance VAS 173L
• Mechanical resistance RMS 5.36N·s/m
• Surround material Cloth
• Spider material Cotton (Silicone Impregnated)

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 466mm
• Baffle cutout diameter 430mm
• Overall depth 232mm
• Flange thickness 11mm
• Mounting depth 221mm
• Volume occupied by the driver (estimated) 8.5L
• Net weight 15.2kg
• Frame material Aluminium