English: Five audio transformers for various line level purposes. The two on the left are 1:1 transformers for splitting signals, balancing unbalanced signals, or isolating two different AC ground systems. The two cylindrical transformers fit into octal sockets; one is a line transformer working at 600 ohms, the second is a bridging transformer working at 15,000 ohms. On the far right is a direct injection box; the yellow transformer changes a high impedance input to a low impedance output.
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