If it is new ,great and you love it most probably your tubes are fine try overdriving the preamp section with an Ibanez TS-9 stompbox or a boss hyperfuzz set to "gain boost" either of these will allow the natural character of you amp to show through.
Also, have you had your amp up LOUD enough for the power tubes to break up? Tube amplifiers tend to have a "sweet spot" where the distortion sounds best at a specific volume.