Acoustic Elegance IB12AU-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 24Hz
• Mechanical quality factor QMS 3.80
• Electrical quality factor QES 0.59
• Total quality factor QTS 0.51

Large signal parameters

• Maximum linear excursion xmax 18mm
• Maximum excursion before damage xlim 22mm
• Air volume displaced at xmax VD 954cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 2.7Ω
• Inductance (1kHz) LE 0.16mH

Magnet

• Force factor Bl 8.75N/A
• Motor constant Bl/√RE 5.33N/√W

Diaphragm

• Effective diameter 260mm
• Effective area SD 530cm²
• Moving mass MMS 110g
• Moving mass (without air load) MMD 102g

Suspensions

• Stiffness KMS 2.5N/mm
• Compliance CMS 400µm/N
• Equivalent volume to the compliance VAS 160L
• Mechanical resistance RMS 4.35N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Volume occupied by the driver (estimated) 2.4L