Slim Line surface-mount loudspeakers have a very thin profile (2” D or less) and are ideal for nearfield applications. They are voiced to deliver an accurate neutral sound. The SL-2.1 R is a slim 2-way loudspeaker designed to be surface mounted and disappear into the architectural surroundings. Its precision ribbon HF driver and two 4” long-excursion LF drivers resolve complex audio program with detail and clarity that does not seem possible from such a small package.