[/HTML]For decades, the bass combo amp has pretty much looked like a head+cabinet merged into 1 self contained box with the controls right there on the front. Figure 1 Over the last few years the combo amp has evolved to where instead of the head and tone controls being mounted for front access, they are now installed at the rear of the amp with access from above. Figure 2 I was rather surprised when I saw Hartke moving in this direction as well. Figure 3 Can someone explain to me why this is the new norm? I own one of each "style" and see benefits of them both.