How low is a piano?

4186 hz

Hmm

higher than the crossover point for most tweeters...

another reason pianos are difficult to reproduce...

Supposedly, the two hardest things to record are piano and human voice -- not because of frequency range, but because they have wider dynamics (soft-to-loud) than all other sources. Anyone else ever hear this?

Reproducing piano on a speaker is an interesting subject. I've owned a lot of different speakers, and of all of them, I'd say that the ProAc Response 1 was the best at reproducing piano in a lifelike way. The thing is, it is a small speaker with limited low frequency reach, and it wasn't my favorite overall.

OHM Walsh speakers cross over at around 8khz I believe in which case the single Walsh driver would handle most everything a piano can produce. Piano does sound very dynamic and natural on the Walshs.

Don't forget the harmonics extend way higher.