DB Drive P4M6C

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.8dB
• Frequency response 115 - 2800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 160Hz
• Mechanical quality factor QMS 9.00
• Electrical quality factor QES 0.85
• Total quality factor QTS 0.78

Large signal parameters

• Power handling P 150W
• Program power Pmax 275W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz, estimated) LE 0.35mH

Magnet

• Force factor Bl 6.8N/A
• Motor constant Bl/√RE 3.8N/√W

Diaphragm

• Effective diameter 131mm
• Effective area SD 134cm²
• Moving mass MMS 11.1g
• Moving mass (without air load) MMD 10g

Suspensions

• Stiffness KMS 11.1N/mm
• Compliance CMS 90µm/N
• Equivalent volume to the compliance VAS 2.3L
• Mechanical resistance RMS 1.24N·s/m

Dimensions

• Nominal diameter 6.5″
• 165mm
• Volume occupied by the driver (estimated) 0.5L