Esoteric Grandioso M1X monoblock power amplifier
Of all the brand lines I've reviewed, none's sound has changed as much over time as Esoteric's top-tier Grandioso series. When I first encountered Grandioso setups at shows, they consistently sounded dark. That in itself is not necessarily bad; the darker presentations of some concert venues and hi-fi systems often enhance detail. But I prefer my music more illumined, with all the color and brilliance that instruments and voices can offer. And over the last three years or so, Esoteric's sound has become better lit, as though a 40W bulb was replaced by a 75W bulb.
Source: stereophile.com