Very accurate description of the GK 800RB (which i own and described a bit)....I run it full range at 300 watts and leave the 100 watt amp unused though i may very well try it with some kind of 8 ohm speaker. Mostly i run the 800RB at 4 ohms...it is a legendary amp and is powerful like the Eden Metro and not far off tonewise comparing the Metro to the 800RB, except when pushed the 800RB is indeed dirtier, the "hitting the rails" sound which if one does a search, there is loads on the net about this amp. Honestly i have not played many GK amps but have heard plenty in clubs and on stages....the 800RB is legendary, it is very small and not heavy for a 300 watt amp designed in the 80's....when pushed it does its thing! i cant imagine using a less powerful amp than 300 really punchy watts with my 65 Epiphone Newport and its neck only 'mudbucker'...the Metro is more powerful but i rarely push either hard....I actually do use some dirt and fuzz at lower volumes ONLY lol! I wont risk blowing anything!