Switchable Phase Reverser

The Shure A15PRS is a switchable phase reverser (polarity switch). It’s used to reverse the phase (polarity) of a balanced audio signal, which helps when wiring is incorrect or when you have two signals that are out of phase (which causes comb filtering etc.).

Key Features

• Phase Reversal – Instantly reverses the polarity of a balanced audio signal.

• Switchable Control – Small toggle switch to select normal or reversed polarity.

• Balanced Signal Support – Works with balanced microphone or line-level signals.

• Bidirectional Use – Can be connected in either direction (input ↔ output).

• Durable Build – Steel housing with gray enamel finish, fully magnetic shielded.

• Standard Connectors – 3-pin XLR female input and 3-pin XLR male output.

• Compact Size – About 19 mm (0.75 in) diameter and 141 mm (5.5 in) length.