hi, i've got a warwick protube IV head and a 4x10 cab i'm getting 200W out of the head. I play in a rock band with quite a loud drummer and two marshall 4x12 solid state half stacks. I turn the volume on my amp like all the way to 8 to hear myself well in rehearsals. And i turn the volume of the channels up enough so it clips quite often but for just a fraction of a second when i hit really hard a really low note like D on the B string. Now i'm i hurting my amp? do i need to get another cab let's say a 1x15 to get 400w out of my amp so i can turn down the volume like to 4 and be able to turn down the volume of the channels so it virtually never clips. I'm new to having a head/cab setup so i don't know for sure if they are design to go through that much pressure or not.