MD Lab SW-ES12

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.3dB

Thiele & Small parameters

• Resonance frequency (free air) fS 30.4Hz
• Mechanical quality factor QMS 2.02
• Electrical quality factor QES 0.95
• Total quality factor QTS 0.65

Large signal parameters

• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.8Ω
• Inductance (1kHz, estimated) LE 2.05mH

Magnet

• Force factor Bl 9.63N/A
• Motor constant Bl/√RE 4.94N/√W

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 121g
• Moving mass (without air load) MMD 113g

Suspensions

• Stiffness KMS 4.43N/mm
• Compliance CMS 226µm/N
• Equivalent volume to the compliance VAS 77.4L
• Mechanical resistance RMS 11.5N·s/m

Dimensions

• Nominal diameter 12″
• 314mm
• Overall diameter 314mm
• Baffle cutout diameter 283mm
• Overall depth 102mm
• Flange thickness 30mm
• Mounting depth 72mm
• Volume occupied by the driver (estimated) 1.6L