MONACOR SPH-135C

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.7dB
• Frequency response 40 - 8000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 4.48
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.39

Large signal parameters

• Maximum linear excursion xmax 3.5mm
• Air volume displaced at xmax VD 33cm³
• Power handling P 50W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 0.75mH
• VC Diameter 35.5mm
• Winding material Kapton

Magnet

• Force factor Bl 6.5N/A
• Motor constant Bl/√RE 2.65N/√W
• Diameter 100mm
• Weight 0.5kg

Diaphragm

• Effective diameter 110mm
• Effective area SD 95cm²
• Moving mass MMS 12g
• Moving mass (without air load) MMD 11.3g

Suspensions

• Stiffness KMS 0.741N/mm
• Compliance CMS 1350µm/N
• Equivalent volume to the compliance VAS 17L
• Mechanical resistance RMS 0.67N·s/m

Dimensions

• Nominal diameter 5.25″
• 133 x 133mm
• Overall size 133 x 133mm
• Baffle cutout diameter 122mm
• Overall depth 75mm
• Flange thickness 4mm
• Mounting depth 71mm
• Volume occupied by the driver (estimated) 0.4L
• Net weight 1.43kg