Mackie's CR4.5 Creative Reference powered studio monitors provide studio-quality sound with a tone shaping control for switching between reference and casual listening. Equipped with multiple inputs and adjustable desktop and bookshelf modes, these speakers deliver clear, powerful audio in any environment. Use the tone knob to adjust the sound, starting with the transparent quality expected from professional studio monitors then gradually adding more bass and treble for an exciting listening experience. Whether using them for work or leisure, the Mackie CR4.5 monitors may be the only speakers you'll ever need.