P.Audio GST-181200 v3

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.2dB
• Frequency response 30 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 13.73
• Electrical quality factor QES 0.57
• Total quality factor QTS 0.54

Large signal parameters

• Maximum linear excursion xmax 6mm
• Air volume displaced at xmax VD 735cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.76mH
• VC Diameter 101.6mm
• Winding height HVC 27mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Flux density B 1.1T
• Force factor Bl 22.8N/A
• Motor constant Bl/√RE 9.63N/√W
• Air gap height HAG 15mm
• Material Ferrite

Diaphragm

• Effective diameter 397mm
• Effective area SD 1225cm²
• Moving mass MMS 239g
• Moving mass (without air load) MMD 209g
• Material Waterproof Paper

Suspensions

• Stiffness KMS 11.8N/mm
• Compliance CMS 85µm/N
• Equivalent volume to the compliance VAS 180L
• Mechanical resistance RMS 3.83N·s/m
• Surround material Cloth
• Spider material Cotton (Silicone Impregnated)

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 467mm
• Baffle cutout diameter 425mm
• Overall depth 235mm
• Flange thickness 21mm
• Mounting depth 214mm
• Volume occupied by the driver (estimated) 8.9L
• Net weight 16.0kg
• Frame material Aluminium