DB Drive PTW15D2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 31.3Hz
• Mechanical quality factor QMS 6.43
• Electrical quality factor QES 0.59
• Total quality factor QTS 0.54

Large signal parameters

• Maximum linear excursion xmax 17.5mm
• Air volume displaced at xmax VD 1442cm³
• Power handling P 900W
• Program power Pmax 1750W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 4.0Ω
• Inductance (1kHz, in series) LE 2.62mH

Magnet

• Force factor (in series) Bl 20.7N/A
• Motor constant Bl/√RE 10.4N/√W

Diaphragm

• Effective diameter 324mm
• Effective area SD 824cm²
• Moving mass MMS 321g
• Moving mass (without air load) MMD 304g

Suspensions

• Stiffness KMS 12.5N/mm
• Compliance CMS 80µm/N
• Equivalent volume to the compliance VAS 77.8L
• Mechanical resistance RMS 9.8N·s/m

Dimensions

• Nominal diameter 15″
• 381mm
• Volume occupied by the driver 6.2L