MONACOR SPH-300KE

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.5dB
• Frequency response 22 - 2200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 22Hz
• Mechanical quality factor QMS 4.15
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 322cm³
• Power handling P 120W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.2Ω
• Inductance (1kHz) LE 1.5mH
• VC Diameter 65.5mm
• Winding material Glass Fibre

Magnet

• Force factor Bl 12.5N/A
• Motor constant Bl/√RE 5.02N/√W
• Diameter 145mm
• Weight 1.2kg

Diaphragm

• Effective diameter 251mm
• Effective area SD 496cm²
• Moving mass MMS 65g
• Moving mass (without air load) MMD 57g

Suspensions

• Stiffness KMS 1.24N/mm
• Compliance CMS 810µm/N
• Equivalent volume to the compliance VAS 250L
• Mechanical resistance RMS 2.17N·s/m

Dimensions

• Nominal diameter 12″
• 309mm
• Overall diameter 309mm
• Baffle cutout diameter 272mm
• Overall depth 130mm
• Flange thickness 11mm
• Mounting depth 119mm
• Volume occupied by the driver (estimated) 2L
• Net weight 4.3kg