MD Lab SW-C12

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.7dB

Thiele & Small parameters

• Resonance frequency (free air) fS 25.1Hz
• Mechanical quality factor QMS 1.57
• Electrical quality factor QES 0.23
• Total quality factor QTS 0.20

Large signal parameters

• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.8Ω
• Inductance (1kHz, estimated) LE 2.63mH

Magnet

• Force factor Bl 21.3N/A
• Motor constant Bl/√RE 10.9N/√W

Diaphragm

• Effective diameter 250mm
• Effective area SD 492cm²
• Moving mass MMS 176g
• Moving mass (without air load) MMD 168g

Suspensions

• Stiffness KMS 4.41N/mm
• Compliance CMS 227µm/N
• Equivalent volume to the compliance VAS 77.8L
• Mechanical resistance RMS 17.8N·s/m

Dimensions

• Nominal diameter 12″
• 316mm
• Overall diameter 316mm
• Baffle cutout diameter 284mm
• Overall depth 171mm
• Flange thickness 21mm
• Mounting depth 150mm
• Volume occupied by the driver (estimated) 3.1L