JBL Studio 230 6.5-Inch 2-Way Bookshelf Loudspeaker (2) The JBL Studio 230 Bookshelf speakers feature 6.5" PolyPlas driver delivers unrivaled midrange accuracy and powerful bass, delivering unrivaled midrange accuracy and power The 1" CMMD Lite high-frequency driver let you experience sound cinematically - in all its precision imaging, detail, natural balance, and full spectrum mastery High Definition Imaging (HDI) waveguide creates a wide soundstage with pinpoint imaging These speakers have a 21st century elegance wit soft-rounded edges, black gloss paneling, and soft-touch paint