C 451 EB with CK1 Capsule

I would rather recommend a static c451 Akg type in second hand, watch out for the black body model with cardio directivity, it will be just breathtaking... 57 just for Snare Toms at the limit and of course a good guitar amp.... Not great for acoustic strings...

I have a collector's akg c451 first version.... It's killer... Used quite rare but not too expensive.. With an anti pop it works really well for vocals... But also for strings, and other sound sources..

My favorite SDCs are AKG 451s. I value them too highly to use outdoors, because I don't have blimps or fur for them, plus the risk of a random crowd of people on skateboards, bikes, frisbees, "grab and run," whatever. A 57 is probably more than adequate for acoustic guitar (assuming if it's outdoors in a park the playing will be reasonably loud ... not some ppp subtle classical passage). I don't envision a real piano in a park. A portable electronic keyboard will already be constrained by its speakers, so again the 57 would be fine. In a cafe, \*\*IF\*\* there's a stage and I can tape down wires, so everything is safe, I would go to my SDC any day.