I have the 60 and at the beginning I was underwhelmed to say the least. Fizzy and harsh. Then I hooked it up to the app, dialed in a sound, futzed with the bias, sag etc as well and got a pretty decent tone. Now months of use the speaker has broken in and it's far less fizzy. I actually have grown to really like this little amp. I also notice it sounds better cranked up too. Oh and dial that presence knob BACK that helps too.