I bought the Nano (I) to amplify the Double Bass. At first I was impressed, wow, such a little thing and so much power. But then I compared it 1 : 1 with my old Tecamp A/B-Amp - and the difference is so clearly audible: The lows have more headroom and the highs are more clear and natural with the A/B-Amp. And the high mids have something penetrant with the Nano (I thought this came from the pickups or strings). Passing the preamp(s) by using a Fishman platinum or a Headway edb-2 helped only a little bit. To me the Nano of course can be used for DB-Ampflification - but there are better sounding options.