They are killer amps. VERY mean/meanacing low mid growl I've not heard in other amps. I used one for metal (thrash and DM'ish riffs). Gets tight when boosted, but a bit slow in the attack. Not ideal for the styles I mentioned, but that voicing makes up for the slower attack. Great for hard rock too. Classic rock, sure it'll do it, but the voicing is a bit too low mid oriented for my tastes...not voiced in the upper mids. Unique amp for sure.