M-Audio Studiophile DX4 Professional Desktop Monitoring System, Black Desktop Speakers Bookshelf Design Output: 18 watts 2 Built-In Speakers Frequency Range: &gt;95db Features Advanced Crossover Technology, 1" High Frequency Driver, 4" Low Frequency Driver Additional Features: Headphone Jack Speaker Box Capacity: 2 Speaker Dimensions: 8.5x5.75x6.25 &34;