The problem with grand piano is that it's like the elephant and the blind men. It's *huge*. If you put a microphone far enough away from the piano to pick up the whole soundboard, you have to increase the gain, and you pick up everything else in the room. If you are using the mics for live sound, it's a feedback nightmare. You really need to use 2 or even 3 mics. Some people use pressure zone mics (aka boundary mics) on the inside of the lid. I've never had much luck with that. There's 2 ways I know that work fairly well. One is to use a pair of omnis, like the little Naiants, close to the soundboard from above, and reduce the gain to avoid feedback. One on the lower third of the soundboard, around the middle of the strings, the other on the upper third. The other is to use a pair of cardioids, in the same position, but farther from the strings, say 18" (lid open). Very good dynamics can work for this too. I've had very good luck with a pair of AKG C2000B's, which were designed for live orchestral sound reinforcement. I've also had very good luck with AKG D3800 tripower, which is a *not* crappy handheld stage dynamic mic. It's too unforgiving for most vocalists, in my experience, but it *rocks* on piano. Good Luck-Richie