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Ground Lift Switch. Wide Frequency Response. Adjustable Attenuation Pad. Suitable For a Wide Range of Sound SourcesInput Connections: Jack Output Connections: XLR Input impedance: :- 50k Ohms Output impedance: :- 600 Ohms Dimensions: :- 120 x 75 x 45 mm Weight: :- :- 420 g. Passive DI box suitable for transforming unbalanced input signals- typically from musical instruments- into balanced 600 Ohm outputs. This conversion helps in minimizing unwanted noise and potential ground loop issues- thus making it ideal for long cable runs in a professional audio setup. This passive DI box offers a wide array of features including: A ground lift switch- an invaluable feature that helps in eliminating hum and buzz caused by ground loops. This can be critical when interfacing equipment that has different grounding norms. This dual passive DI box also incorporates an attenuation switch with selectable 0dB- -20dB- and -40dB settings. This adjustable switch allows for precise control over the input signal level- thus preventing potential distortion and maintaining signal integrity across a wide range of input sources. Connectivity-wise- it accepts input via an unbalanced 1/4 inch jack- a common connection for guitars- keyboards- and other instruments. This passive DI box also provides an additional jack for parallel link out- essentially functioning as a 'thru' port. This is particularly useful for routing the original- unprocessed signal to onstage amplifiers or monitor systems. Lastly- the output is provisioned through a balanced XLR connector. This three-pin connector standard is well recognized in professional audio and broadcasting due to its robustness and capability to carry balanced signals over long distances with minimal interference. Choosing to use a passive DI box over an active one is often a good choice when working with high-output instruments like keyboards or electric guitars with active pickups- as this type of unit can handle hotter signals without distortion - an added bonus is that it doesn't require power. It's also more rugged and reliable in live sound situations- with fewer components that could fail. Passive DIs are also generally more affordable and easier to use in setups where phantom power or batteries aren't available.. This passive DI box with ground lLift & level pad is suitable for transforming unbalanced input signals- typically from musical instruments- into balanced 600 Ohm outputs . di box-Passive DI box-di box unbalanced to balanced