MONACOR SPM-205/4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.2dB
• Frequency response 37 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 37Hz
• Mechanical quality factor QMS 2.71
• Electrical quality factor QES 0.68
• Total quality factor QTS 0.55

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 63cm³
• Power handling P 70W
• Program power Pmax 150W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.65mH
• VC Diameter 25.5mm
• Winding material Aluminium

Magnet

• Force factor Bl 4.75N/A
• Motor constant Bl/√RE 2.5N/√W
• Diameter 80mm
• Weight 0.38kg

Diaphragm

• Effective diameter 164mm
• Effective area SD 210cm²
• Moving mass MMS 18g
• Moving mass (without air load) MMD 15.8g

Suspensions

• Stiffness KMS 1.02N/mm
• Compliance CMS 980µm/N
• Equivalent volume to the compliance VAS 72L
• Mechanical resistance RMS 1.54N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 200mm
• Baffle cutout diameter 183mm
• Overall depth 88mm
• Flange thickness 8mm
• Mounting depth 80mm
• Volume occupied by the driver (estimated) 0.48L
• Net weight 1.062kg