D.A.S. Audio 18H

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.7dB
• Frequency response 30 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 3.90
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 6mm
• Maximum excursion before damage xlim 12mm
• Air volume displaced at xmax VD 698cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz, estimated) LE 3.63mH
• VC Diameter 102mm
• Winding height HVC 16mm
• Winding material Copper
• Former material Glass Fibre Reinforced Polymer

Magnet

• Force factor Bl 24.1N/A
• Motor constant Bl/√RE 9.76N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 385mm
• Effective area SD 1164cm²
• Moving mass MMS 140g
• Moving mass (without air load) MMD 112g

Suspensions

• Stiffness KMS 5.95N/mm
• Compliance CMS 168µm/N
• Equivalent volume to the compliance VAS 323L
• Mechanical resistance RMS 7.45N·s/m
• Surround material Polycotton
• Spider material Polycotton

Dimensions

• Nominal diameter 18″
• 457mm
• Baffle cutout diameter 417mm
• Volume occupied by the driver (estimated) 6.9L
• Frame material Injected Aluminum