Acoustic Elegance TD12M-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.1dB
• Frequency response 35 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38.1Hz
• Mechanical quality factor QMS 2.99
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.25

Large signal parameters

• Maximum linear excursion xmax 6mm
• Maximum excursion before damage xlim 10mm
• Air volume displaced at xmax VD 319cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.2mH

Magnet

• Force factor Bl 11.9N/A
• Motor constant Bl/√RE 6.66N/√W

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 50g
• Moving mass (without air load) MMD 41.5g

Suspensions

• Stiffness KMS 2.86N/mm
• Compliance CMS 350µm/N
• Equivalent volume to the compliance VAS 140L
• Mechanical resistance RMS 4N·s/m

Dimensions

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