A selection of tools from ART to help eliminate the hum caused by ground loops. These tools are often used in live situations or studios where the mains power isn't conditioned.
CleanBOX II
Designed to eliminate ground loop noise from synthesizer, outboard digital effects, and guitar amplifiers in the studio or on stage, CleanBOX II removes ground loops ‘without any signal degradation’. This stereo isolation box features dual isolation transformers and is designed for line level use. Both inputs and outputs are by way of unbalanced 6.35mm jack socket.
Frequency response: 10Hz - 50kHz, +/- 0.5dB at +4dBu. THD: 0.01% typical at 1kHz, +18dBu, less than 0.05% at 100Hz, +24 dBu. Insertion loss: 0.4dB at 100kOhm load; 5.5dB at 600Ohm load. Connections: 6.35mm TRS balanced/unbalanced jacks. Power: Passive. Dimensions (WxDxH): 114 x 73 x 38mm. Weight: 0.4kg.