L.A. Sound Design is a Burbank, California-based custom pedalboard and guitar rig builder run by David Phillips. The shop specializes in designing, wiring, and configuring professional-grade pedalboards and rack systems for working and touring guitarists, and also operates a gallery showroom of boutique instruments, amps, and effects alongside an equipment-sourcing service for hard-to-find gear.

The company's signature product is the PI-01 pedalboard interface, developed in collaboration with Jensen Transformers to serve as a central junction between a guitarist's pedalboard and multiple amplifiers, aimed at eliminating signal loss and noise caused by long cable runs and complex switching. Beyond the PI-01, much of Phillips's reputation rests on bespoke board builds that integrate third-party pedals, switchers, and power into tour-ready rigs.

Phillips has built pedalboards and racks for a number of high-profile session and touring guitarists, with reported clients including Tim Pierce, Paul Jackson Jr., Michael Landau, Scott Henderson, Doug Aldrich, Brad Paisley, and Prince.

LA Sound Design has 1 product cataloged on Equipboard, including Effects Pedal Accessories. Their gear is featured by 3 artists, with the strongest followings in Rock, Pop, and Blues. Notable users include Chris Impellitteri, Tommy Henriksen, and Nalle Colt.