For me it has been the black AMP for years. Then last season I picked up a Mini AMP just to see how it felt and OMG! Everything changed! I had no idea that I had a small child sized pallet! I just thought diagrams were supposed to choke you a little bit and be hard to blow. Suddenly every elk sound I made was effortless and clear. Unfortunately I only had one (the blue one) on that trip and it only lasted a few days. I just ordered 5 more, along with a couple of the other mini AMPs to try out. If you’re struggling, it’s worth a try.