This is a very good and very powerful, loud valve (really a hybrid - solid state pre-amplifier but valve power amp section) guitar amplifier. Made in New Zealand in the 1980's. It's a head unit, not a combo (I believe there is/was a combo version) . It uses an ECC82 as phase splitter and four 6L6 G (B or C) valves in the power section. Switchable for 50 watts and 100 (130?) watts; use the 50 watt setting and 2 valves are turned off. Also a switch for 4 ohm or 8 ohm speakers. A foot switch switches between clean and over drive channel with control of drive and sustain. Also has a spring reverb. Even on 50 watt setting this amplifier is loud, I have not yet managed to come close to full volume ...but then I don't play at large venues (actually don't play at any venues as I'm just a home "for my own enjoyment guitar player") The distortion, drive, sustain sounds good, the clean channel takes my zoom 505 effects or DS-1 pedal and works really well. Unlike the Rockit Super Lead (which has two 5 band equalizers on the Mk 6 anyway) this amplifier only has bass, mid and treble controls but that's more than adequate. The look, with its cane grill, is reminiscent of Mesa Boogie and some people have said they were a copy of them electronically, from my little research I'd say not so and others have also... I can't really say as I have not had anything to do with the mesas' but a quick look at the Rockit circuitry does not remind me of the early Mesa circuits I have looked at? ...anyway the Rockit sounds good to me in its own right, nice warmish distortion, sustain actually works and with a little reverb it makes my Vester strat copy really sing! There is a master volume control but also a volume control that works alongside the sustain and drive control; the latter three controls give a very wide range from a clean sound to a great deal of distortion/overdrive that never seems harsh...really no need for a distortion/overdrive pedal, this makes all and more than I get from my (three) pedals.
When I found this it needed a certain amount of repair. Fuse was blown due to a bad valve, replaced valve and fuse but still no instrument output, there were input connection problems and it was noisy. I disassembled it, replaced several components cleaned all switches and potentiometers, cleaned valve holders, rewired/repaired connections to jack sockets...also and other stuff since forgotten (forgot to take photos of internals too!) now it's repaired it goes well and sounds great.