MTX Audio TX812

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.4dB
• Frequency response 26 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 5.12
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 12.5mm
• Air volume displaced at xmax VD 622cm³
• Power handling P 1800W
• Program power Pmax 5400W

Voice Coil

• Nominal impedance Z 2Ω
• DC resistance RE 2.0Ω
• Inductance (1kHz, estimated) LE 1.93mH

Magnet

• Force factor Bl 18N/A
• Motor constant Bl/√RE 12.7N/√W

Diaphragm

• Effective diameter 252mm
• Effective area SD 497cm²
• Moving mass MMS 289g
• Moving mass (without air load) MMD 281g

Suspensions

• Stiffness KMS 14.3N/mm
• Compliance CMS 70µm/N
• Equivalent volume to the compliance VAS 24.6L
• Mechanical resistance RMS 12.4N·s/m

Dimensions

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