MONACOR SPH-300TC

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.2dB
• Frequency response 23 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 23Hz
• Mechanical quality factor QMS 3.03
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 4mm
• Air volume displaced at xmax VD 198cm³
• Power handling P 240W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 2 x 8Ω
• DC resistance (in series) RE 12.8Ω
• Inductance (1kHz, in series) LE 4mH
• VC Diameter 50mm
• Winding material Aluminium

Magnet

• Force factor (in series) Bl 20.6N/A
• Motor constant Bl/√RE 5.76N/√W
• Diameter 156mm
• Weight 1.4kg

Diaphragm

• Effective diameter 251mm
• Effective area SD 495cm²
• Moving mass MMS 68g
• Moving mass (without air load) MMD 60.1g

Suspensions

• Stiffness KMS 1.18N/mm
• Compliance CMS 850µm/N
• Equivalent volume to the compliance VAS 290L
• Mechanical resistance RMS 3.24N·s/m

Dimensions

• Nominal diameter 12″
• 306mm
• Overall diameter 306mm
• Baffle cutout diameter 280mm
• Overall depth 140mm
• Flange thickness 11mm
• Mounting depth 129mm
• Volume occupied by the driver (estimated) 2.1L
• Net weight 4.245kg