MONACOR SP-304PA

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.1dB
• Frequency response 40 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 3.87
• Electrical quality factor QES 0.60
• Total quality factor QTS 0.52

Large signal parameters

• Maximum linear excursion xmax 3.3mm
• Air volume displaced at xmax VD 167cm³
• Power handling P 175W
• Program power Pmax 350W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.4mH
• VC Diameter 39mm
• Winding material Aluminium

Magnet

• Force factor Bl 9.39N/A
• Motor constant Bl/√RE 4.95N/√W
• Diameter 125mm
• Weight 0.85kg

Diaphragm

• Effective diameter 256mm
• Effective area SD 514cm²
• Moving mass MMS 63g
• Moving mass (without air load) MMD 54.8g

Suspensions

• Stiffness KMS 3.33N/mm
• Compliance CMS 300µm/N
• Equivalent volume to the compliance VAS 117L
• Mechanical resistance RMS 4.09N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 305mm
• Baffle cutout diameter 280mm
• Overall depth 130mm
• Flange thickness 0mm
• Mounting depth 130mm
• Volume occupied by the driver (estimated) 1.6L
• Net weight 3.0kg