The Radial PRO D2 stereo DI features two high-performance Eclipse ET-DB2 transformers to deliver 20Hz-20kHz performance with less than 1.5dB deviation above 18kHz and withstand high signal levels without distortion. Unlike active circuits that overload when the signal exceeds the rail voltage, transformers saturate to create a pleasing effect that naturally rounds out the tone. The subtle limiter effect is ideal for use with digital pianos, samplers and drum machines that can produce excessive dynamics. Transformers are particularly adept at eliminating hum and buzz caused by ground loops.