The iO4 has four input channels, each having an XLR microphone input, a 1/4-inch TRS insert for external effects units and a 1/4-inch TS jack that works with line-level sources and can accommodate direct connection of guitars.
The iO4 features discrete-design preamplifiers and 48-volt phantom power on each of its four input channels as well for use with virtually all microphones and audio sources.
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