The Portaflex 15 was my first passive bass cabinet. I currently have it paired with a Hartke TX600, and I am loving the sound I'm getting. The Portaflex, while just a single 15", still provides tons of punch when desired, and you can contour your sound further by adjusting the level of the HF horn driver. This thing takes pedals so well that I have a hard time making myself turn my overdrive pedal off half the time. While it's not the loudest or biggest cabinet out there, it's perfect for gigging as it provides you with some volume on stage without relying on the venue's monitors. It's cumbersome but not too heavy, and the included casters make a big difference. Would buy again!