If it's 20 watt SS, the micro terror has plenty of headroom then?
It is solid state, yes, but the little single tube that's smiling at you from the casing has a great impact resulting in an amazing sound for such a small amp with plenty of headroom and especially lots of volume! I use this thing to play metal (boosted with a Digitech Bad Monkey) and I can't urge people enough to get one. So much bang for the buck, it's amazing 8)