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!
My first real amp was this Lab Series, obtained from my friend and guitar teacher Erik it was too big and loud to use at home (there I used a pignose) so I took it with me to squater venue Bar&Boos where it became part of the backline and I got to play it every jam session
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 late 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 slightly complex equalizer and the built-in compressor, but the reward is great. The speakers are Ceramic CTS units. While not at all bad, I wanted something with more clarity, so I swapped them for a couple of 70W Jensen ceramics. This really brought the best out of this extremely underrated amp.