Overall I’m really happy with this little thing. I’ve never had a tube amp before but so far it sounds really excellent despite the ridiculous spelling error and poor craftsmanship of the outer shell/bottom feet Being totally crooked. It pumps my Tekton full floor standers to very loud volumes and the bass is outstanding. I went ahead and took others Advice and threw a 12ax7 in the preamp tube spot before I even listened to the stock tube.
Brohammer619I LOL'd ... did not notice this is a "Tubr" amp!
FYI tube amps hate glass tables or any other surfaces susceptible to vibration. It looks like yours is on a tool box ... you might want to put it on another surface, or throw some dampers underneath those amazingly level feet. A set of 4 Isol-Pads are ~ $25 from SoundStageDirect.