What type of circuit is typically used for balanced connections in audio applications?

In audio applications, a balanced circuit is specifically designed to minimize noise and interference when transmitting audio signals over long distances. This type of circuit employs a configuration that utilizes two signal wires—one carrying the audio signal in its original phase and the other carrying the same signal in reverse phase. When the signals arrive at the receiving end, any noise or interference that was picked up along the way affects both signal wires equally and can be effectively canceled out, resulting in a cleaner audio signal.

This capability to reduce unwanted noise and interference makes balanced circuits particularly advantageous in professional audio contexts, such as concert settings, recording studios, and any environment where high-quality sound reproduction is essential. Balanced connections are commonly found in XLR and TRS (Tip-Ring-Sleeve) connectors, which are staples in the audio industry.

In contrast, unbalanced circuits, series circuits, and parallel circuits do not provide the same level of noise rejection and reliability for audio transmission over longer distances.