MONACOR SPH-145HQ

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.6dB
• Frequency response 52 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 52Hz
• Mechanical quality factor QMS 3.07
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.44

Large signal parameters

• Maximum linear excursion xmax 3.5mm
• Air volume displaced at xmax VD 28cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.53mH
• VC Diameter 25mm
• Winding material Aluminium

Magnet

• Force factor Bl 5.33N/A
• Motor constant Bl/√RE 2.21N/√W
• Diameter 72mm
• Weight 0.23kg

Diaphragm

• Effective diameter 101mm
• Effective area SD 80cm²
• Moving mass MMS 7.6g
• Moving mass (without air load) MMD 7g

Suspensions

• Stiffness KMS 0.952N/mm
• Compliance CMS 1050µm/N
• Equivalent volume to the compliance VAS 9.4L
• Mechanical resistance RMS 0.81N·s/m

Dimensions

• Nominal diameter 5.5″
• 145mm
• Overall diameter 145mm
• Baffle cutout diameter 119mm
• Overall depth 66mm
• Flange thickness 6mm
• Mounting depth 60mm
• Volume occupied by the driver (estimated) 0.26L
• Net weight 0.739kg