Model No of Direct Box.: DIRECT Frequency Response:10Hz - 25KHz Noise Level(22Hz - 22KHz,Input Shorted) : -100dBu THD+N (10Hz-22KHz): ≤ 0.01%typ.@1V RMS,1KHz Input : One 1/4 Phone Jack, Unbalanced XLR connector (Balanced or Unbalanced) Output : One XLR connector, Balanced Link Output : One 1/4 Phone Jack, Unbalanced PAD Switch : 0dB, -20dB, -40dB setting Dimensions: 158 x 100 x 50mm Weight: 0.4kg APPLICANT: This products can be used in many studio and P.A. system. The primary function of this direct box is to accept the high impedance(usually unbalanced) output of the instruments like a guitar, bass or keyboard and "convert" it to a balanced, low-impedance signal. Most high quality mixers-both P.A. and recording varieties - are required balanced, "Lo-Z" signals to assure an optimal frequency response and noise performance.The product accomplishes this through the use of a high-quality audio transformer. The wide frequency response and low distortion of this unit lets the subtle timbres of your instruments arrive at your mixer's or recorder's input instantly.