DB Drive PTW10D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83dB

Thiele & Small parameters

• Resonance frequency (free air) fS 33.6Hz
• Mechanical quality factor QMS 5.99
• Electrical quality factor QES 0.57
• Total quality factor QTS 0.52

Large signal parameters

• Maximum linear excursion xmax 17.5mm
• Air volume displaced at xmax VD 604cm³
• Power handling P 900W
• Program power Pmax 1750W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.4Ω
• Inductance (1kHz, in series) LE 3.45mH

Magnet

• Force factor (in series) Bl 22.2N/A
• Motor constant Bl/√RE 8.78N/√W

Diaphragm

• Effective diameter 210mm
• Effective area SD 345cm²
• Moving mass MMS 208g
• Moving mass (without air load) MMD 204g

Suspensions

• Stiffness KMS 9.09N/mm
• Compliance CMS 110µm/N
• Equivalent volume to the compliance VAS 16.4L
• Mechanical resistance RMS 7.3N·s/m

Dimensions

• Nominal diameter 10″
• 254mm
• Volume occupied by the driver 2.8L