The Manley Langevin Dual Vocal Combo is a 2 channel microphone preamplifier with 2 shelf equalizers plus 2 channels of electro-optical limiters. The combo is the result of suggestions from our dealers to combine two of the most popular all discrete Langevin products. This includes VU meters, phantom power, limiter linking and time proven circuitry. This should be an ideal box for musicians and engineers on a budget and be equally at home in a studio, mobile recording truck or live gig. It has the reliability, functionality, and the sound without the complexity. The essential features without the sea of knobs?