The Radial J48 has been designed from the ground up to deliver the most natural tone. Using only 48V phantom power, the Radial J48 is an active direct box that produces an exceptionally linear response that extends from 20Hz up to well above 40kHz. A unique digital switching power supply raises the internal operating rail voltage for added headroom and improved signal handling. The J48 delivers an ideal even-order harmonic cascade and a sonic performance and includes a -15dB input pad to tame extra loud signals, 180º polarity reverse for feedback control on stage and a ground lift to help reduce hum & buzz caused by ground loops. The J48 is also equipped with an 80Hz high-pass filter (low-cut).