Pioneer DJ Bulit5 Active Reference 5-Inch Monitors - Black - Pair w/ 20ft XLR Cables - Bundle This FrontRow bundle contains : (1) Pair of Pioneer DJ Bulit5 Active Reference 5-Inch Monitors - Black and (2) Strukture PRO20M7 Heavy Duty 20ft. XLR mic cable Quality audio For maximum audio performance, increased bass output, and reduced unwanted resonance, each speaker utilizes a highly rigid medium density fiberboard (MDF) for its enclosure and bass reflex ducts. To optimize sound quality and reliability, the woofers are made with aramid fiber cones and soft dome tweeters infused in magnetic fluid. Class AB bi-amp A highly efficient Class AB amplifier drives the speakers in a bi-amp configuration to power the tweeters and woofers separately. Groove technology To improve airflow through the port of the enclosure, the port hole was engineered with grooves to help direct the sound waves smoothly. The technique decreases standing waves from the mouth of the port, resulting in smooth bass and mid-bass output with more impact. Convex diffuser Matching the bass output of the speakers, the soft dome tweeters are set in the center of a convex diffuser optimizing output and dispersing the sound energy in both left and right directions for wider imaging. For a cool cosmetic look, the diffuser illuminates in white when the speakers are powered on.