It’s a Twin Reverb with a mad twist. I love the compressor and the Bob Moog filters. It’s loud, heavy and sensitive on the controls like a Doberman. Not for everyone but a really good amp - without tubes!
The reason modern solid-stade amplifiers suck, is that serious musicians don't want them, so they're made as cheaply as possible. In the 70s, before tubes became cool again, Gibson/Moog decided to make the best guitar amplifier possible. The LAB Series was the result. And boy, is it great. Loud and clean as a Twin Reverb, with great tone-shaping abilities. It takes some knowledge to get the best out of the complex equalizer and the built-in compressor, but the reward is great.