Made in collaboration with JBL, the kings of studio monitoring, the LSR30X is based on the best 5-inch powered reference monitor in its price range: the JBL LSR305. Every pair of these full-size bookshelf speakers is measured and matched to within 1 dB, and the quality of every component is backed by the company’s 70 years of acoustic research and development. Equipped with a magnetically shielded 5-inch low-frequency transducer and a 1-inch soft-dome high-frequency transducer, each speaker also features JBL’s revolutionary Image Control Waveguide and patented Slip Stream bass port design. Completing the package are a handsome piano gloss lacquer finish, rubber isolation feet, a printed frequency graph with your serial number, and a letter from the JBL team.