The NDR-20 can be used in many studio and P.A.system.The primary function of this direct box is to accept the highimpedance (usually unbalanced) output of the instruments likea guitar, bass or keyboard and “convert” it to a balanced,low-impedance signal. Most high quality mixers-both P.A. andrecording varieties -are reuired balanced, “Lo-Z ”signals toassure an optimal frequency response and noise performance.The NDR-20 accomplishes this through the use of a high-quality audio transformer. The wide frequency response andlow distortion of this unit lets the subtle timbres of yourinstruments arrive at your mixers or recorders input instacntly.