D.A.S. Audio 12B

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97dB
• Frequency response 50 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 46Hz
• Mechanical quality factor QMS 8.72
• Electrical quality factor QES 0.19
• Total quality factor QTS 0.19

Large signal parameters

• Maximum linear excursion xmax 4mm
• Maximum excursion before damage xlim 10mm
• Air volume displaced at xmax VD 216cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz, estimated) LE 2.03mH
• VC Diameter 102mm
• Winding height HVC 12mm
• Winding material Aluminium EFW
• Former material Glass Fibre Reinforced Polymer

Magnet

• Force factor Bl 23.5N/A
• Motor constant Bl/√RE 9.84N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 262mm
• Effective area SD 540cm²
• Moving mass MMS 65g
• Moving mass (without air load) MMD 56.3g

Suspensions

• Stiffness KMS 5.32N/mm
• Compliance CMS 188µm/N
• Equivalent volume to the compliance VAS 77.8L
• Mechanical resistance RMS 2.15N·s/m
• Surround material Polycotton
• Spider material Polycotton

Dimensions

• Nominal diameter 12″
• 305mm
• Baffle cutout diameter 289mm
• Volume occupied by the driver (estimated) 2.4L
• Frame material Injected Aluminum