I've had a few 5150's and the combo was the first I had, and the best sounding one. I thought it sounded good, then I plugged it into one of my greenback cabs and nearly shit myself at the difference. I pulled the POS sheffields out and put some blackbacks in it and it sounded great. I sold it to buy a head, since the combo is the size of a small truck, but I never thought the head sounded as good.