Pioneer DJ DM-40D Active Desktop Monitors - 4"Each DM 40D speaker boasts a Class D amplifier with 96 kHz samplingDSP, updated DECO convex diffusers, and a 4 inch woofer thats perfectly aligned with the tweeter. As a result, the desktop monitor system produces pure, balanced bass sound, crystal clear highfrequencies, and plenty of power when you need it. Want to DJ or make your own music? Flip the switch to choose either DJ mode or Production mode and the DSP settings will be optimized forthe