Focal AUDITOR RSB 300

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.8dB
• Frequency response 30 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 25Hz
• Mechanical quality factor QMS 4.50
• Electrical quality factor QES 0.52
• Total quality factor QTS 0.47

Large signal parameters

• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.4Ω
• Inductance (1kHz, in series, estimated) LE 3.62mH
• VC Diameter 50mm

Magnet

• Force factor (in series) Bl 16.6N/A
• Motor constant Bl/√RE 6.56N/√W
• Diameter 144mm

Diaphragm

• Effective diameter 245mm
• Effective area SD 471cm²
• Moving mass MMS 130g
• Moving mass (without air load) MMD 122g
• Material Polypropylene

Suspensions

• Stiffness KMS 3.33N/mm
• Compliance CMS 300µm/N
• Equivalent volume to the compliance VAS 93L
• Mechanical resistance RMS 4.54N·s/m
• Surround material Butyl

Dimensions

• Nominal diameter 12″
• 323mm
• Overall diameter 323mm
• Baffle cutout diameter 282mm
• Mounting depth 142mm
• Volume occupied by the driver (estimated) 1.8L
• Net weight 4.3kg