The Grace Design m303s is a high performance stereo active DI. It is galvanically isolated, delivering low noise, next-generation audio performance for all stage and studio applications. Our advanced power supply design provides incredible headroom and dynamic range. A custom-wound Lundahl transformer outputs amazing low-end clarity and high frequency detail. All of this performance is packaged in beautiful and rugged ¼” extruded aluminum chassis. Don’t let the elegant exterior fool you, this thing is built.