A passive mixer with 8 channels is a straightforward audio device designed to combine multiple audio signals into a single output without requiring external power. The mixer typically offers eight input channels, allowing you to connect various audio sources such as microphones, instruments, and line-level devices. Each channel usually includes a combination of input jacks or connectors to accommodate different types of connections, such as XLR, 1/4-inch TRS, or RCA.Unlike powered mixers, which include built-in amplification circuits, a passive mixer relies solely on passive electronic components (such as resistors and capacitors) to combine and route audio signals. This means that it does not require external power to operate, making it a simple and portable solution for basic audio mixing tasks. A passive mixer typically has minimal controls, if any. Instead, each input channel usually includes a level or volume knob to adjust the signal level of that channel. Some models may also feature pan controls to adjust the balance between the left and right stereo channels. The core component of a passive mixer is its summing circuit, which combines the audio signals from all input channels into a single output. The summing circuit ensures that the audio signals are properly mixed together without introducing distortion or noise. The mixer provides a single output connector (such as a 1/4-inch TRS or RCA jack) where you can connect your mixed audio signal to an amplifier, recording device, or other audio equipment. Some passive mixers may also include additional outputs for monitoring or recording purposes. One of the main advantages of a passive mixer is its simplicity and reliability. Without the need for external power or complex electronic circuits, passive mixers are less prone to technical issues and are often more cost-effective than their powered counterparts. Passive mixers are compatible with a wide range of audio equipment, including microphones, instruments, DJ gear, and consumer audio devices. They can be used in various applications such as live sound reinforcement, recording studios, home audio systems, and more.