DB Drive G7 15.1

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.5dB

Thiele & Small parameters

• Resonance frequency (free air) fS 24.5Hz
• Mechanical quality factor QMS 2.18
• Electrical quality factor QES 0.47
• Total quality factor QTS 0.39

Large signal parameters

• Maximum linear excursion xmax 35mm
• Air volume displaced at xmax VD 2643cm³
• Power handling P 4000W
• Program power Pmax 8000W

Voice Coil

• Nominal impedance Z 2 x 1Ω
• DC resistance (in series) RE 1.4Ω
• Inductance (1kHz, in series, estimated) LE 2.44mH
• VC Diameter 76.2mm

Magnet

• Force factor (in series) Bl 17.9N/A
• Motor constant Bl/√RE 15.1N/√W
• Material Ferrite

Diaphragm

• Effective diameter 310mm
• Effective area SD 755cm²
• Moving mass MMS 703g
• Moving mass (without air load) MMD 687g

Suspensions

• Stiffness KMS 16.7N/mm
• Compliance CMS 60µm/N
• Equivalent volume to the compliance VAS 48.5L
• Mechanical resistance RMS 49.6N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 402mm
• Baffle cutout diameter 352mm
• Mounting depth 298mm
• Volume occupied by the driver (estimated) 4.9L
• Frame material Aluminium