MTX Audio TR12-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.6dB
• Frequency response 32 - 200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 4.54
• Electrical quality factor QES 0.82
• Total quality factor QTS 0.69

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 431cm³
• Power handling P 200W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz, estimated) LE 1.89mH

Magnet

• Force factor Bl 10.4N/A
• Motor constant Bl/√RE 5.81N/√W

Diaphragm

• Effective diameter 262mm
• Effective area SD 539cm²
• Moving mass MMS 138g
• Moving mass (without air load) MMD 130g

Suspensions

• Stiffness KMS 5.62N/mm
• Compliance CMS 178µm/N
• Equivalent volume to the compliance VAS 72.8L
• Mechanical resistance RMS 6.11N·s/m

Dimensions

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