MONACOR SPX-20M

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.8dB
• Frequency response 157 - 22000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 157Hz
• Mechanical quality factor QMS 4.52
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 0.5mm
• Air volume displaced at xmax VD 0.7cm³
• Power handling P 15W
• Program power Pmax 30W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.9Ω
• Inductance (1kHz) LE 0.13mH
• VC Diameter 25mm
• Winding material Kapton

Magnet

• Force factor Bl 4.5N/A
• Motor constant Bl/√RE 1.71N/√W
• Diameter 39mm

Diaphragm

• Effective diameter 41mm
• Effective area SD 13cm²
• Moving mass MMS 1.3g
• Moving mass (without air load) MMD 1.3g

Suspensions

• Stiffness KMS 1.32N/mm
• Compliance CMS 760µm/N
• Equivalent volume to the compliance VAS 0.2L
• Mechanical resistance RMS 0.28N·s/m

Dimensions

• Nominal diameter 2″
• 57mm
• Overall diameter 57mm
• Baffle cutout diameter 52mm
• Overall depth 38mm
• Flange thickness 4mm
• Mounting depth 34mm
• Net weight 0.17kg