I am fascinated by the fact that the same cab will not work with a head that will work with a different head. Ditto for the same amp will sound poorly with one cab but blossom with another. One interesting example is the "odd couple" of the thin sounding Shuttle 6 with the "portly" Ampeg HLF. They match better than most amps. You are welcome to mention your favorite combinations, but if you also added what didn't work, that would give us more information.