It doesn't sound boxy to me and the bass is there in a balanced way.

It doesn't have a deep full shake the timbers bottom.

The volume is perfect for what i use it for & it sounds really nice at low volumes.

So far, I mainly use the low input and push it with pedals if I want full saturation.

The Twin Tube Classic works great for this.

I'm still trying to decide if it is worth exchanging it in an attempt to get one with less buzz.