MTX Audio T612-44

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85dB
• Frequency response 33 - 200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33.1Hz
• Mechanical quality factor QMS 5.10
• Electrical quality factor QES 0.75
• Total quality factor QTS 0.65

Large signal parameters

• Maximum linear excursion xmax 16mm
• Air volume displaced at xmax VD 850cm³
• Power handling P 400W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 7.0Ω
• Inductance (1kHz, in series, estimated) LE 5.72mH

Magnet

• Force factor (in series) Bl 21.2N/A
• Motor constant Bl/√RE 8.04N/√W

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 228g
• Moving mass (without air load) MMD 219g

Suspensions

• Stiffness KMS 10.3N/mm
• Compliance CMS 97µm/N
• Equivalent volume to the compliance VAS 38.6L
• Mechanical resistance RMS 9.28N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Volume occupied by the driver (estimated) 2.3L