Hi, I am so happy with my Shuttle 6.2 12T combo, it gives me what I need in small gigs, but in medium/high or outside gigs I need more low frequencies. I am thinking about an extension but my budget is pretty low right now, and the weight, dimensions and the vertical 312 stack are a plus. Since there is no sensitivity spec for the K-212, do you think it is going to pair well? Do you think it is going to give the spread I need in medium/big gigs? My shuttle 12T cab: 375Watts RMS - 8ohm - 99dB Sensitivity 1W/1M The K-212 cab: 400Watts - 8ohm The amp release 375Watts at 8ohm and 600Watts at 4ohm Thank you very much for sharing your knowledge!!