The TX-J3 Passive Unbalanced to Balanced Input Transformer from RDL is a useful option in situations requiring the passive mixing of two unbalanced line-level audio signals to a balanced (or unbalanced) audio output. Front-panel input options include two gold-plated RCA jacks and a 1/8" mini-input, intended for mono or stereo consumer-level sources.
The RCA inputs are automatically disabled when signal is connected to the 3.5mm input. The line-level output is routed through the front-panel detachable terminal block for connection to 10 kilohms or higher input impedance line-level equipment inputs and modules. The module does not add gain to the consumer-level input, thus the balanced output level from the module is not a standard +4 dBu.
