| 摘要 |
There is provided a phantom powered circuit for selectively boosting an analogue audio signal, the circuit comprising: an input for receiving an input audio signal from an active input requiring power; an output for outputting an output audio signal; a DC block between the input and the output, the DC block in a further preferred embodiment, and comprising an input transformer connected to the input and an output transformer connected to the output; and a boosting circuit between the input transformer and the output transformer, the boosting circuit selectively user operable in use to selectively boost the audio signal; and a phantom power line connected between the output and input transformers, the phantom power line configured for bypassing the DC block by supplying DC power from the output to the input. |
