The MB58R series is a further example of how Markbass is always
  one step ahead in innovating using state-of-
  the-art technologies. Once again Marco De Virgiliis with his
  pioneering soul has managed to create this new series of products
  which, with the use of custom components born thanks to years of
  experience and research Markbass and the use of revolutionary
  materials with an eye to the future and the evironment, has
  really nailed the tone and power versus portability issue.
  The new LITTLE MARK 58R amp new design features all the
  connections and controls on the front panel leaving on the rear
  panel only the speaker outs and AC power socket, offering optimal
  ergonomics and making everything more practical. This amp
  features updated 4 band EQ section, the new bi-band limiter
  paired with a 500 watt MPT power amp, a mute switch, and the 3
  way rotary-switch that that includes the options of a Flat,
  Scooped or FSW (Footswitchable) EQ options, all in an high build
  quality and ultralight new chassis in ABS (V0), a super portable
  package that weights only 2Kg.