Lot's of folks don't understand the difference between studio monitors and bookshelf speakers.
Bookshelfs are meant to fill a room with sound. The frequency response and sound of bookshelf speakers is going to be somewhat ( or a lot) hyped. Imagine a graphic equalizer with the bass and treble bands pushed up, and midrange frequencies pulled down. This type of speaker sounds great on your pop music and dance music.
Studio monitors are meant to be flat, clean and clear. They are not designed to fill an entire room with sound. They are meant to be set up a few feet in front of the listener, and played at a moderate volume. In a way you can think of monitor speakers as headphones that sit out in front of you.
If you are sitting 3-4 feet directly in front of them, enough bass. Or at least enough to discern whether an instrument needs to be eq-ed.