How it works in the path
Bus-powered over USB-C means the 4i4 draws at most 8 watts from the host computer — no IECThe standard three-prong appliance power inlet on rack gear — the kettle lead. C13/C14 in spec-sheet speak. cable, no power brick hunting for a strip space. That simplicity is genuinely useful at load-in when you are already cable-managing a full IEMIn-Ear Monitor — earpieces that replace floor wedges, feeding each player their own mix. The reason this whole rack exists. rack. The two preampsThe gain stage that lifts a mic’s tiny signal up to line level — the first thing a signal hits, and a big part of how a console sounds. with Air mode are good quality for the price, though in a pure playback application you will rarely touch them. The two balancedCarries the signal on two wires and cancels whatever noise both pick up — why mic cables can run hundreds of feet hum-free. line outputs are what matter most here: they feed your console or IEM transmitter cleanly, and TRSTip-Ring-Sleeve — a 1/4″ jack with three contacts carrying a balanced signal or a stereo pair. A guitar plug with one extra ring. at line levelThe strong signal that runs between pieces of gear (about a volt) — hotter than mic level, far below speaker level. is universally patchable on any stage.
