Acoustic Elegance TD15M-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 99.1dB
• Frequency response 30 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 34.7Hz
• Mechanical quality factor QMS 5.09
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 6mm
• Maximum excursion before damage xlim 10mm
• Air volume displaced at xmax VD 513cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.2mH

Magnet

• Force factor Bl 11.8N/A
• Motor constant Bl/√RE 6.6N/√W

Diaphragm

• Effective diameter 330mm
• Effective area SD 855cm²
• Moving mass MMS 70g
• Moving mass (without air load) MMD 52.9g

Suspensions

• Stiffness KMS 3.33N/mm
• Compliance CMS 300µm/N
• Equivalent volume to the compliance VAS 312L
• Mechanical resistance RMS 3N·s/m

Dimensions

• Nominal diameter 15″
• 381mm
• Volume occupied by the driver (estimated) 4.3L