The Active DI Box from BSS Audio uses an enhanced version of the same audio path as the AR–116, now regarded by many people as a reference standard. The sound quality is legendary, particularly on acoustic and bass guitars. Numerous applications can be satisfied by the AR–133. For example, as well as the traditional guitar use, the AR–133 can be used with keyboards, DJ consoles, amplifier outputs, and other electronic sources. An additional bonus is the ability to use the AR–133 as an active balancing device.