L-550AXII is a Mark 2 model of L-550AX which launched in 2011. L-550AXII makes its debut featuring a high-precision electric controlled attenuator LECUA and the latest version of proprietary high sound quality feedback circuit ODNF4.0, both are used in LUXMAN‚¬„s upper range amplifiers.

Keeping the symbolic appearance with traditional pointer-type meters on the front panel, the essence of the expressive power that made a huge step forward whilst developing the flagship integrated amplifier L-590AXII was poured into this model to provide its dense expression particular to pure A class sound and more detailed reproduction of the low range.