FBT Mitus 121S Passive Subwoofer


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  • Passive version, recommended amplifier of 2000Wrms / 4ohm
  • Large vented bass-reflex subwoofer, extremely deep low frequency extension
  • 530 mm (21’’) custom B&C neodymium high excursion subwoofers with 115 mm (4.5’’) coil
  • Frequency response from 29Hz to 250Hz
  • Neutrik Speakon NL – 4MDV connectors IN & LINK OUT
  • External digital processor requie
  • 18 mm (3/4’’) birch plywood enclosure with large reflex vent free from turbulence, scratch resistant black paint
  • M20 Stand socket and six FBT design aluminium handles
  • Optional 4 swivel-mount casters 80 mm (3.15’’) on request
  • Perfect low-frequency extension for the MITUS range and ideal companion for the MITUS 206L line array for ground stack applications with optional MT-B206 metal base


Code: 31862
Configuration: 1 reflex way
Recommended amplifier: 2000 W RMS
Long Term power: 1000 W
Short term power: 3600 W
Nominal impedance: 4 ohm
Frequency response: 29hz – 250hz -6dB
Low Frequency woofer: 1×21 – 4.5 coil neodymium inch
Sensitivity (@1W/1m): 99 dB
Maximum SPL cont/peak: 136/139 half-space dB
Dispersion: omnidirectional HxV
Crossover Frequency: external active KHz
Recommended HP filter: 25hz – 45dboct
Recommended external filter: Digital management with FBT presets
Input connector: 2 x speakon NL4MD-V in & thru
Net Dimension (WxHxD): 590x780x760 – 23.2×30.7×29.9 mm/inch
Net Weight: 56/123.5 Kg/lb
Transport Dimension (WxHxD): 805x650x930 – 31.7×25.6×36.6 mm/inch
Transport Weight: 64.5/142.2 kg/lb

Click here to download FBT MITUS SERIES PDF

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