I got my dUg Ultra 1000 today and was able to briefly put it through it's paces tonight.
While it is an amp purposefully made to do a specific sound well, it's actually quite versatile and you can dial back the top end distortion quite a bit to make the amp work great for any kind of rock music, reggae, some pop, etc.
It's not going to be my go-to for ultra clean jazz tone, but it can do anything from "clean" to very mild overdrive to full blown, snarling distortion.
Tech 21 nailed their goal, which was to combine the sound dUg gets from a couple pedals and running two amps. It has a classic Tech 21 sound, that bright, clear, slightly compressed sound, and the added features like the crossovers, overdrive, comp, etc. really push it to a whole new level. I own a lot of Tech 21 gear and you can't get the sound of the dUg Ultra from their other gear. It's really a well thought out, unique amp.
The power section is sensitive to your cab's ohms rating. I recommend running it with a 4 ohm cab. It's still good with an 8 ohm cab but while it puts out an adequate volume at 8 ohms, it's significantly louder and present at 4 ohms.
It went from "hmm, that'll be a usable volume, I guess" at 8 ohms, to "holy crap, I'm gonna peel the paint off the walls!" at 4 ohms. I couldn't stop smiling once it really started dishing out the big volume and even bigger tone.
It really gives you an ideal tone for distorted rock of any form, and one I've been chasing for years with various combinations of pedals and rack gear in front of my amp. And with recommended settings in the manual for Pinnick, Squire and Entwistle you know it's going to give you some bad-ass dirty tone. I have to admit seeing a recommended setting in the manual for an Entwistle tone setting made me a bit giddy.
Besides the tone, it's also a 2 rack space, 12 lb. amp. I'm putting it in a 2 or 3u lightweight rack and it's a very gig/travel friendly weight and size.
It is picky about the cab and bass you use with it but with the right combination it just kills. It seemed to work really well with a P bass, so that's a bonus for me. It wanted to squeal with an active bass, so it needed some taming either by disengaging the boost button on the amp (which gives you a 10dB boost and is great for having a passive bass slam the front of the amp in a good sounding way), or turning down the volume from the bass.
I'll try every sample setting from the manual, more different kinds of basses and pedals, and experiment with getting different tones from the amp in the next couple weeks and report more specific info about it here. I didn't have a lot of time to work with it tonight so my thoughts on it right now are more general. But it definitely impressed me.