Sweet stereo silence. The Radial ProD2 Passive Stereo Direct Box uses 2 proprietary transformers (one for each channel) for both impedance conversion and isolation for ground loop hum and buzz elimination. Linear from 20Hz-18kHz, with low distortion and virtually zero phase distortion. The ProD2 features include XLR and 1/4" thru/input, -15dB pad, and ground lift protected from damage by a protective front panel. Heavy-duty construction. 600ohm balanced output. 3" x 5".