MTX Audio RTX128

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.2dB
• Frequency response 66 - 5200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 61Hz
• Mechanical quality factor QMS 10.37
• Electrical quality factor QES 0.77
• Total quality factor QTS 0.72

Large signal parameters

• Maximum linear excursion xmax 0.8mm
• Air volume displaced at xmax VD 42cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz, estimated) LE 1.68mH

Magnet

• Force factor Bl 11.9N/A
• Motor constant Bl/√RE 5.06N/√W

Diaphragm

• Effective diameter 260mm
• Effective area SD 530cm²
• Moving mass MMS 51.4g
• Moving mass (without air load) MMD 43.1g

Suspensions

• Stiffness KMS 7.52N/mm
• Compliance CMS 133µm/N
• Equivalent volume to the compliance VAS 52.9L
• Mechanical resistance RMS 1.9N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Mounting depth 117mm
• Volume occupied by the driver (estimated) 2.3L