Millennia NSEQ-4 - Discrete Solid State Two Channel Parametric EQThe NSEQ 4 has brought new meaning to elegance in audio control and sound quality. Where the NSEQ 2 was head and shoulders above many other equalizers in musicality, control, and audio quality, the NSEQ 4 has taken all those attributes to a new level. Features: World's first (and only) all discrete, true differential Class A input buffer amplifier. Selectable balanced or unbalanced input. Greatly improved 3rd generation FSA 03 all discrete EQ