MONACOR SPM-116/8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.5dB
• Frequency response 75 - 18000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 75Hz
• Mechanical quality factor QMS 1.90
• Electrical quality factor QES 0.81
• Total quality factor QTS 0.57

Large signal parameters

• Maximum linear excursion xmax 1.5mm
• Air volume displaced at xmax VD 8.6cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.2Ω
• Inductance (1kHz) LE 0.4mH
• VC Diameter 20.5mm
• Winding material Aluminium

Magnet

• Force factor Bl 4.2N/A
• Motor constant Bl/√RE 1.57N/√W
• Diameter 70mm
• Weight 0.23kg

Diaphragm

• Effective diameter 85mm
• Effective area SD 57cm²
• Moving mass MMS 3.8g
• Moving mass (without air load) MMD 3.5g

Suspensions

• Stiffness KMS 1.02N/mm
• Compliance CMS 980µm/N
• Equivalent volume to the compliance VAS 4.5L
• Mechanical resistance RMS 0.94N·s/m

Dimensions

• Nominal diameter 4″
• 115mm
• Overall diameter 115mm
• Baffle cutout diameter 94mm
• Overall depth 60mm
• Flange thickness 7mm
• Mounting depth 53mm
• Volume occupied by the driver (estimated) 0.17L
• Net weight 0.557kg