Unison Research has launched its Unico 90 integrated amp. Intended to sit under its flagship 150 model, the 90 is a valve and solid-state hybrid with a preamp stage that is built around an Alps volume control and input switching that decouples inactive inputs. The valve-based gain stage uses ECC83 and ECC81 tubes in Unison’s totem pole configuration. These are directly coupled to the output stage, which consists of three pairs of HEXFET output devices to give it a claimed power output of 2x 100W into 8ohm and 2x 160W into 4ohm. Two XLR and three RCA input connections are fitted along with fixed and variable outputs. Distributed in the UK by Henley Audio, the Unison Research Unico 90 costs £3,500 in silver with a black finish available as a £100 option. Distributed in the UK by Henley Audio, you can find out more about the Unico 90 here