User manual ART CLEANBOX II

[. . . ] Clean Box II Ground Loop Eliminator The facts about Ground Loops: Frequently hum in an audio system is caused by loop effects, which act like antennas. [. . . ] The safest way to eliminate ground loops is with the Clean Box II. This transparent device easily and safely removes ground loops without any signal degradation . Examples of ground loops: The power ground of a synthesizer, connected to the signal ground of the synth, into a mixer's ground, then into a mixer's power ground. The signal ground of a send effect (reverb, delay) into a mixer, and the connecting power grounds of the mixer and the unit. The power ground of a guitar amplifier, connected to a signal processor which has a second guitar amplifier on the other channel, and then the second guitar amp's power ground. Specifications: Frequency Response: 10Hz ­ 50kHz, +/- . 5dB @ +4dBu THD: . 01% Typical @ 1kHz, +18dBu <. 05% @ 100Hz, +24 dBu Insertion Loss: . 4dB @ 100kOhm Load 5. 5dB @ 600Ohm Load Connections: ¼" TRS balanced/unbalanced jacks. (Passive). Usage: Minimize setup to one piece of equipment Carefully add pieces of equipment, listening for any hum. Once a piece of equipment is found to cause a ground loop disconnect from the system. [. . . ] NOTE: Never place a Clean Box II on the output of a power amplifier, you could seriously damage the equipment [. . . ]