D.A.S. Audio 18SX

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.3dB
• Frequency response 25 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 39.2Hz
• Mechanical quality factor QMS 4.57
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.47

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 931cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 2.44mH
• VC Diameter 102mm
• Winding material Copper

Magnet

• Force factor Bl 23.5N/A
• Motor constant Bl/√RE 9.53N/√W
• Material Ferrite

Diaphragm

• Effective diameter 385mm
• Effective area SD 1164cm²
• Moving mass MMS 185g
• Moving mass (without air load) MMD 157g

Suspensions

• Stiffness KMS 11.2N/mm
• Compliance CMS 89µm/N
• Equivalent volume to the compliance VAS 172L
• Mechanical resistance RMS 9.98N·s/m

Dimensions

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