The single op-amp differential amplifier shown in Figure 1 is often used as an audio balanced line receiver. Obtaining high common-mode rejection is a critical requirement that requires four ...

This is an audio A/B selector with gain control. The project uses op-amps and resistors to smoothly switch between microphone and line inputs.

Linear Tube Audio’s Century Monoblocks: hand-built ZOTL amps with Screen-Drive tubes, 110 W/8 Ω, low output impedance, and full balanced inputs.

In a balanced op-amp circuit, the op-amp inputs see equal impedances looking into the circuit. Balanced circuits provide better performance by cancelling some input errors and have a simple R F /R I ...

Hardcore audiophiles are generally immune to sticker shock for high-end audio gear like $50,000 speaker-based rigs. But now you can get the same level of sound for a lot less if you build a sound ...

The Pro-Ject DS3 B incorporates technology from high-end phono preamplifiers, bringing the balanced input listening experience to a far larger audience. Pro-Ject’s Phono Box line of phono ...