MONACOR SPH-30X/4SW

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87dB
• Frequency response 105 - 17000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 105Hz
• Mechanical quality factor QMS 9.35
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 6cm³
• Power handling P 20W
• Program power Pmax 50W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.5mH
• VC Diameter 21mm
• Winding material Kapton

Magnet

• Force factor Bl 3.91N/A
• Motor constant Bl/√RE 2.08N/√W

Diaphragm

• Effective diameter 62mm
• Effective area SD 30cm²
• Moving mass MMS 2.63g
• Moving mass (without air load) MMD 2.5g

Suspensions

• Stiffness KMS 1.19N/mm
• Compliance CMS 840µm/N
• Equivalent volume to the compliance VAS 1.06L
• Mechanical resistance RMS 0.19N·s/m

Dimensions

• Nominal diameter 3″
• 81 x 81mm
• Overall size 81 x 81mm
• Baffle cutout diameter 73mm
• Overall depth 42mm
• Flange thickness 1mm
• Mounting depth 41mm
• Volume occupied by the driver (estimated) 0.11L
• Net weight 0.143kg