Interesting review, thanks.
I also got a U500 recently for use at a studio last weekend. I didn’t really need it in the end but had a chance to give it a try.
I agree with the comments about the controls, though I tend to have everything flat and found the best sound by using ‘Flat’ and ‘Linear’ options. I didn’t touch the effects or drive options.
I think it sounded really nice like that - very loud and full sounding with a really throaty bass sound, not at all ‘boxy’
It’s not a bad one handed lift but probably a bit heavy to move very far, I found it easier to carry like a box instead 📦
The main reason I got one was for the price, the power, and because I really wanted a big combo with a built in compressor. I was delighted to find the compressor in this amp works really well, in a superb ‘limiting’ style, not at all squashy and breathy like some I could mention.
I’m sure I’ll get round to trying some other voicings and some of the effects in due course but with everything flat it’s a great piece of kit, I think.