Sleek and powerful, RD amplifiers deliver outstanding amplifier performance and versatility at an unprecedented value. RD Amplifiers Developed in-house by the same engineering team that brought you the XDv2 and HD amplifiers, our latest RD amplifiers utilize JL Audio’s exclusive NexD™ switching technologies to generate loads of power with exceptional efficiency to reduce current draw and heat. Each model features a modern, industrial design with a high performance look and finish.