To be honest, I don't know. I learned this by reading reviews (before the BA redesign). I chose this amp anyway because of the way it sounded compared to other small practice amps, I love it. I have never had any trouble with it either, but have never had a need to turn it up any higher than 5-6. Most of the time I am only powering headphones at around 4-5. When I want to get loud I plug into my buddies amps far away from the volume nazi I live with.What's the loudest recommended?