MONACOR SPH-250KE

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.3dB
• Frequency response 23 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 23Hz
• Mechanical quality factor QMS 5.25
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.41

Large signal parameters

• Maximum linear excursion xmax 4.8mm
• Air volume displaced at xmax VD 164cm³
• Power handling P 100W
• Program power Pmax 150W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 0.7mH
• VC Diameter 50mm
• Winding material Kapton

Magnet

• Force factor Bl 9.4N/A
• Motor constant Bl/√RE 3.81N/√W
• Diameter 120mm
• Weight 0.84kg

Diaphragm

• Effective diameter 210mm
• Effective area SD 346cm²
• Moving mass MMS 45g
• Moving mass (without air load) MMD 40.3g

Suspensions

• Stiffness KMS 1.06N/mm
• Compliance CMS 940µm/N
• Equivalent volume to the compliance VAS 204L
• Mechanical resistance RMS 1.24N·s/m

Dimensions

• Nominal diameter 10″
• 258mm
• Overall diameter 258mm
• Baffle cutout diameter 232mm
• Overall depth 123mm
• Flange thickness 0mm
• Mounting depth 123mm
• Volume occupied by the driver (estimated) 1.3L
• Net weight 2.92kg