MONACOR SPH-250CTC

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.3dB
• Frequency response 20 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 20Hz
• Mechanical quality factor QMS 5.12
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.25

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 154cm³
• Power handling P 200W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 2 x 8Ω
• DC resistance (in series) RE 13.6Ω
• Inductance (1kHz, in series) LE 4mH
• VC Diameter 50mm
• Winding material Kapton

Magnet

• Force factor (in series) Bl 19.2N/A
• Motor constant Bl/√RE 5.21N/√W
• Diameter 145mm
• Weight 1.2kg

Diaphragm

• Effective diameter 209mm
• Effective area SD 343cm²
• Moving mass MMS 70g
• Moving mass (without air load) MMD 65.4g

Suspensions

• Stiffness KMS 1.02N/mm
• Compliance CMS 980µm/N
• Equivalent volume to the compliance VAS 220L
• Mechanical resistance RMS 1.72N·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) 1.6L
• Net weight 3.8kg