MTX Audio RT12-44

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.1dB
• Frequency response 28 - 200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 28Hz
• Mechanical quality factor QMS 6.60
• Electrical quality factor QES 0.78
• Total quality factor QTS 0.70

Large signal parameters

• Maximum linear excursion xmax 16mm
• Air volume displaced at xmax VD 816cm³
• Power handling P 250W
• Program power Pmax 750W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.4Ω
• Inductance (1kHz, in series, estimated) LE 4.23mH

Magnet

• Force factor (in series) Bl 15.7N/A
• Motor constant Bl/√RE 6.19N/√W

Diaphragm

• Effective diameter 255mm
• Effective area SD 510cm²
• Moving mass MMS 164g
• Moving mass (without air load) MMD 156g

Suspensions

• Stiffness KMS 5.38N/mm
• Compliance CMS 186µm/N
• Equivalent volume to the compliance VAS 68L
• Mechanical resistance RMS 4.37N·s/m

Dimensions

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