I used to own a 4-pro years ago. Now since the 4 pro had 1200 watts output a 4ohms, I went with the Ampeg
PR 410 HLF. That particular cabinet is also rated at 1200 watts. I play 5 string Spectors and Warwicks. When you want to articulate the low frequencies from a low B string, you have to have an abundence of power and headroom. I found that particular combination to be killer. Also, the cabinet has an adjustable high frequency horn.