Very musical, powerful bass, sweet midrange, and highs that are never harsh or grainy. You can also tube roll, which means you can change the sound a little by changing the pre-tubes. I replaced Conrad Johnson Sonogrape pre/power combo with it, and the Unico beats it in all respects. But make sure it is properly warmed up before listening/judging performance, it took 36 hours for mine to start to shine again after being unplugged.