Palmer PLI-02, 2-Channel Isolating Transformer in Cast Aluminium HousingIsolating transformers / line isolation boxes are used between line-operated devices to prevent ground loops that cause hum. However, they can also be used for the conversion of unbalanced to balanced lines.@+@+PLI-02 - Dual-channel line isolation box for professional stage / studio use. The input jack is a Neutrik combo-socket, which accommodates both male XLR plugs as well as jack plugs. An XLR / m jack is used on the output side. Balanced or unbalanced operation is easily possible thanks to the combination socket in the input. This makes the PLI-02 perfect for balancing unbalanced mixer outputs (Jack In, XLR Out). However, it can also be easily used for the transformer balancing of existing electronic inputs or outputs.@+@+, 2 Channel isolating transformers in cast aluminum casing, per channel: Input: XLR / f-jack combo socket, Output: XLR / m, Transmission ratio: 1: 1, Nominal level: 0 db, Maximum level: 20 dB, Nominal impedance input / output: 600 ohms, Ground Lift switch for both channels, 5 Year warranty