MTX Audio T815-44

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.4dB
• Frequency response 33 - 200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 3.30
• Electrical quality factor QES 0.80
• Total quality factor QTS 0.64

Large signal parameters

• Maximum linear excursion xmax 16mm
• Air volume displaced at xmax VD 1287cm³
• Power handling P 600W
• Program power Pmax 1800W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.5Ω
• Inductance (1kHz, in series, estimated) LE 6.06mH

Magnet

• Force factor (in series) Bl 21.8N/A
• Motor constant Bl/√RE 8.55N/√W

Diaphragm

• Effective diameter 320mm
• Effective area SD 804cm²
• Moving mass MMS 275g
• Moving mass (without air load) MMD 259g

Suspensions

• Stiffness KMS 12.5N/mm
• Compliance CMS 80µm/N
• Equivalent volume to the compliance VAS 73L
• Mechanical resistance RMS 17.3N·s/m

Dimensions

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