MTX Audio T615-44

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.4dB
• Frequency response 26 - 200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 26.2Hz
• Mechanical quality factor QMS 5.20
• Electrical quality factor QES 0.55
• Total quality factor QTS 0.50

Large signal parameters

• Maximum linear excursion xmax 16mm
• Air volume displaced at xmax VD 1402cm³
• Power handling P 500W
• Program power Pmax 1500W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.1Ω
• Inductance (1kHz, in series, estimated) LE 6.77mH

Magnet

• Force factor (in series) Bl 25.4N/A
• Motor constant Bl/√RE 10.3N/√W

Diaphragm

• Effective diameter 334mm
• Effective area SD 876cm²
• Moving mass MMS 355g
• Moving mass (without air load) MMD 338g

Suspensions

• Stiffness KMS 9.62N/mm
• Compliance CMS 104µm/N
• Equivalent volume to the compliance VAS 113L
• Mechanical resistance RMS 11.2N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Volume occupied by the driver (estimated) 4.3L