D.A.S. Audio 18S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.9dB
• Frequency response 25 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 6.92
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 8mm
• Maximum excursion before damage xlim 15.5mm
• Air volume displaced at xmax VD 931cm³
• Power handling P 800W
• Program power Pmax 1600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz, estimated) LE 3.92mH
• VC Diameter 102mm
• Winding height HVC 21mm
• Winding material Copper EFW
• Former material Glass Fibre Reinforced Polymer

Magnet

• Flux density B 1.02T
• Force factor Bl 23.7N/A
• Motor constant Bl/√RE 9.44N/√W
• Air gap height HAG 10mm
• Material Ferrite

Diaphragm

• Effective diameter 385mm
• Effective area SD 1164cm²
• Moving mass MMS 150g
• Moving mass (without air load) MMD 122g

Suspensions

• Stiffness KMS 6.37N/mm
• Compliance CMS 157µm/N
• Equivalent volume to the compliance VAS 302L
• Mechanical resistance RMS 4.49N·s/m
• Surround material Polycotton
• Spider material Polycotton

Dimensions

• Nominal diameter 18″
• 457mm
• Baffle cutout diameter 415mm
• Volume occupied by the driver (estimated) 5.6L
• Net weight 12.2kg
• Frame material Injected Aluminum