Features 1、【Highquality Signal Processing】: Our 4channel passive DI box is the perfect tool for musicians and audio professionals in stage and studio settings. With a solid extruded aluminum chassis and rubber feet, it ensures durability and stability. It provides impedance and signal matching for direct connections between instruments and mixers or amplifiers, resulting in highperformance audio quality. 2、【Versatile Connectivity Options】: Equipped with both 6.35mm and XLR inputs and outputs, our DI box offers flexibility in connecting various audio devices. The jack allows you to send an unbalanced signal to an onstage amplifier while routing the balanced signal to the mixer, ensuring optimal sound distribution. 3、【Professionalgrade Construction】: Designed for the rigors of touring and live performances, our DI box features an ultrarugged roadsuitable metal case. Its highquality components and exceptionally rugged construction ensure long life and durability, making it a reliable choice for musicians and sound engineers alike. 4、【Ground Lift Switch for Noise Elimination】: We understand that ground loop problems can plague any audio setup. That's why our DI box is equipped with a Ground Lift switch, which effectively eliminates typical ground loop issues. This ensures clean and interferencefree audio signals, allowing you to focus on your performance. 5、【Impedance Versatility】: Our DI box is compatible with a wide range of audio devices. Whether you're using high impedance instruments or low impedance external devices, our DI box provides the necessary impedance matching for seamless integration. With its ATTSlide Switch, you can adjust the input terminal impedance to suit your specific needs, further enhancing the versatility of this essential audio tool. Specification Channel: 4 channels Input: 6.35mm TRS Output: 6.35mm TRS, XLR Input Sensitivity (ref output level=0.775V/600ohm.1mw) ATT40dB Input level: INPUT LEVEL(100mW)70.7V ATT 20B Input level: INPUT LEVEL(10mW)22.4V ATT 0dB Input level: INPUT LEVEL(1mW)7.1V Total Harmonic Distortion: 20Hz~20KHz0.03% Frequency Response: +0dB/1dB20Hz~20KHz Input Impedance: ATT0dB50Kohm (MATCHINGZ) ATT20dB50Kohm (NORMINALZ) ATT40dB100Kohm (NORMINALZ) Output Impedance: 600ohm(MATCHINGZ) Product Size: 11.5 * 13.6 * 5.8 cm/4.5 * 5.4 * 2.3 inch Product Weight: 361 g/12.7 oz   Package List 1 * Passive Direct Box