I'm very glad I bought this cab to go with my 5150 III 50w! I also own the matching 212 but it's pretty heavy and a bit cumbersome to cart around. Either cab sounds stellar! I'm now considering picking up a 2nd 112 cab to use in my wet/dry setup. Overall, I find these 5150 II cabs really let the rich harmonic content and "sizzle" of the 5150 amps to shine!