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Description
A 4-channel powered audio mixer is a compact device designed to combine and control audio signals from multiple sources, such as microphones, instruments, or playback devices, into a single output. This mixer has four input channels, allowing you to connect up to four different audio sources simultaneously. Each channel typically includes a dedicated input jack or connector for connecting microphones, instruments, or line-level devices like keyboards or audio players. Each input channel usually includes a preamplifier (preamp) to amplify weak signals from microphones or instruments to a level suitable for processing and mixing. Each channel typically includes a set of controls for adjusting various parameters of the input signal, such as volume (gain), equalization (EQ) settings (e.g. , bass, midrange, treble), and effects (if applicable). These controls allow you to tailor the sound of each channel to suit your preferences and requirements. Some mixers feature pan/balance controls for each channel, allowing you to adjust the position of the audio signal within the stereo field. This can be useful for creating a balanced mix and positioning individual sound sources within the stereo image. The mixer includes master controls for adjusting the overall output level (master volume) and may also feature additional controls for global EQ, effects, and monitoring. Unlike non-powered mixers, a powered mixer includes a built-in power amplifier, which eliminates the need for external amplification equipment. The power amplifier amplifies the mixed audio signal to drive speakers or other audio output devices directly. The mixer provides output connectors for connecting to external devices such as speakers, amplifiers, recording equipment, or headphones. Common output connectors include balanced XLR, unbalanced TRS or RCA, and sometimes speaker binding posts. Some powered mixers include built-in effects processors, such as reverb, delay, or chorus, allowing you to add spatial effects to your mix without the need for external effects units.
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