Doesn't deliver stated power

I had a 2 channel, 320 watt Hifonics amp gained up a little over halfway with zero bass boost on running an alpine type R. I decided to "upgrade" to the alpine. at 2 ohms, this 400 watt (not quite) amplifier had to be gained all the way up and have the bass boost completely tapped to sound as good as the hifonics. it does sound good, but it's like buying a new car and driving it around at 7000 rpm -- it works well, but it's not going to last very long since you're completely strapping it. good sound, but very underpowered. this amp would hammer if you had a subwoofer that required less power than the type r, but if you have something with a huge basket and lots of excursion, look right past this amp.