Subwoofers
Who doesn't like bass? Whether you have a stereo system or a home cinema system, there's a lot to be said for bringing a subwoofer to the party.
In a two-channel hi-fi audio system, a decent subwoofer, which crossed over and set up correctly, will help define acoustic space, add gravitas to the piano, and enable everything above the bass foundation to sound more natural, relaxed, and compelling.