Acoustic Elegance TD18H+8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 99dB
• Frequency response 20 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 29Hz
• Mechanical quality factor QMS 5.90
• Electrical quality factor QES 0.23
• Total quality factor QTS 0.22

Large signal parameters

• Maximum linear excursion xmax 14mm
• Maximum excursion before damage xlim 25mm
• Air volume displaced at xmax VD 1705cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.41mH

Magnet

• Force factor Bl 27.1N/A
• Motor constant Bl/√RE 11.4N/√W

Diaphragm

• Effective diameter 394mm
• Effective area SD 1218cm²
• Moving mass MMS 165g
• Moving mass (without air load) MMD 136g

Suspensions

• Stiffness KMS 5.26N/mm
• Compliance CMS 190µm/N
• Equivalent volume to the compliance VAS 390L
• Mechanical resistance RMS 5.03N·s/m

Dimensions

• Nominal diameter 18″
• 457mm
• Volume occupied by the driver (estimated) 6.9L