P.Audio EX18-1000S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.9dB
• Frequency response 35 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38Hz
• Mechanical quality factor QMS 8.64
• Electrical quality factor QES 0.65
• Total quality factor QTS 0.61

Large signal parameters

• Maximum linear excursion xmax 5.3mm
• Air volume displaced at xmax VD 643cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.87mH
• VC Diameter 99.3mm
• Winding height HVC 25.5mm
• Winding material CCAR
• Former material Glass fiber

Magnet

• Flux density B 1T
• Force factor Bl 20.1N/A
• Motor constant Bl/√RE 8.35N/√W
• Air gap height HAG 15mm
• Material Ferrite

Diaphragm

• Effective diameter 396mm
• Effective area SD 1225cm²
• Moving mass MMS 190g
• Moving mass (without air load) MMD 160g
• Material Paper

Suspensions

• Stiffness KMS 11.1N/mm
• Compliance CMS 90µm/N
• Equivalent volume to the compliance VAS 191L
• Mechanical resistance RMS 5.24N·s/m
• Surround material Cloth
• Spider material Cotton (Double)

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 460mm
• Baffle cutout diameter 418mm
• Overall depth 212mm
• Flange thickness 12mm
• Mounting depth 200mm
• Volume occupied by the driver (estimated) 7.2L
• Net weight 13.0kg
• Frame material Steel