I do need to get it looked at for sure. It could be a preamp tube on the out I guess. I will definitely consider that. I use a pf500 at one of our rehearsal spaces and it is every bit as loud as one side of the 4 pro. I had considered a pf800 for the inevitable amp blow mid show if I keep at what I am currently doing. Also, I am not faithful to the Ampeg tone. I would love to pick up an SVT but I really don't want to move it. P**** s*** I know but I use my back a lot at work, haul some heavy ass cabs and would rather not destroy it more than I have to.
I don't know why I decided to buy this 4 pro. I think I was just desperate for wattage. After my first show with these guys I saw how far 500w and an 810 would get me... which was not far at all. I literally couldn't hear myself at all and had to rely solely on muscle memory and visual cues. I did get the amp for $500 so it shouldn't be to difficult to recover that.
I have been thinking about grabbing a Carvin BX1600. It has numbers similar to the 4 pro but at 20% of the weight, a warranty and (I have heard) a more honest power rating. Really its either that or a LARGE power amp that I can just keep "cranked" at like 3 or 4. Either way I am at a point financially where I can get my 2000s up and running and then I will be able to run two amps via ABY.