MTX Audio T812-22

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86dB
• Frequency response 32 - 200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32.5Hz
• Mechanical quality factor QMS 4.10
• Electrical quality factor QES 0.65
• Total quality factor QTS 0.56

Large signal parameters

• Maximum linear excursion xmax 16mm
• Air volume displaced at xmax VD 837cm³
• Power handling P 500W
• Program power Pmax 1500W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.2Ω
• Inductance (1kHz, in series, estimated) LE 2.3mH

Magnet

• Force factor (in series) Bl 13.7N/A
• Motor constant Bl/√RE 7.72N/√W

Diaphragm

• Effective diameter 258mm
• Effective area SD 523cm²
• Moving mass MMS 191g
• Moving mass (without air load) MMD 183g

Suspensions

• Stiffness KMS 7.94N/mm
• Compliance CMS 126µm/N
• Equivalent volume to the compliance VAS 48.7L
• Mechanical resistance RMS 9.5N·s/m

Dimensions

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