The DM-40 from Pioneer is a pair of black, active, two-way monitors designed for wide-range music reproduction for DJs, producers, and musicians in mobile setups and personal studios. The class AB amplifiers pump 21W of power through 4” fiberglass woofers and 0.75” soft dome tweeters. Front-mounted diffusers and bass flex ducts yield an expanded frequency response and a wide sweet spot. Place the monitors on the supplied cushions to minimize unwanted vibrations and resonance from your desk or table. Connect your DJ mixer, stereo system, audio interface, or smartphone to the 3.5mm or RCA input jacks using the included 3.5mm to RCA cable. The front-panel 3.5mm headphone port and dedicated volume control allow you to easily check your mix on headphones.