MTX Audio RTX658

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.7dB
• Frequency response 136 - 6500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 149Hz
• Mechanical quality factor QMS 8.29
• Electrical quality factor QES 1.27
• Total quality factor QTS 1.10

Large signal parameters

• Maximum linear excursion xmax 0.3mm
• Air volume displaced at xmax VD 3.9cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz, estimated) LE 0.55mH

Magnet

• Force factor Bl 6.14N/A
• Motor constant Bl/√RE 2.51N/√W

Diaphragm

• Effective diameter 130mm
• Effective area SD 133cm²
• Moving mass MMS 8.58g
• Moving mass (without air load) MMD 7.4g

Suspensions

• Stiffness KMS 7.52N/mm
• Compliance CMS 133µm/N
• Equivalent volume to the compliance VAS 3.32L
• Mechanical resistance RMS 0.97N·s/m

Dimensions

• Nominal diameter 6.5″
• 165mm
• Mounting depth 67mm
• Volume occupied by the driver (estimated) 0.5L