DB Drive G7 12.2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 82dB

Thiele & Small parameters

• Resonance frequency (free air) fS 30.3Hz
• Mechanical quality factor QMS 2.27
• Electrical quality factor QES 0.61
• Total quality factor QTS 0.48

Large signal parameters

• Maximum linear excursion xmax 35mm
• Air volume displaced at xmax VD 1654cm³
• Power handling P 4000W
• Program power Pmax 8000W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.2Ω
• Inductance (1kHz, in series, estimated) LE 3.74mH
• VC Diameter 76.2mm

Magnet

• Force factor (in series) Bl 19.6N/A
• Motor constant Bl/√RE 11N/√W
• Material Ferrite

Diaphragm

• Effective diameter 245mm
• Effective area SD 473cm²
• Moving mass MMS 386g
• Moving mass (without air load) MMD 378g

Suspensions

• Stiffness KMS 14.1N/mm
• Compliance CMS 71µm/N
• Equivalent volume to the compliance VAS 22.5L
• Mechanical resistance RMS 32.5N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 328mm
• Baffle cutout diameter 283mm
• Mounting depth 244mm
• Volume occupied by the driver (estimated) 2.9L
• Frame material Aluminium