Balanced vs Unbalanced Cables Explained (2026): Stop the Hum for Good
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If you have ever fought a mysterious hum in your studio, the answer is usually cables. Understanding balanced vs unbalanced connections is the single most useful piece of signal-chain knowledge — it tells you which cables to use where, and why some setups hum and others stay silent.
Browse all audio cables, or read our how to choose an XLR cable guide.
How balanced cables reject noise
A balanced cable (XLR or TRS) carries the signal twice — once normal, once inverted — plus a ground. At the destination the inverted copy is flipped back and summed, which cancels any noise the cable picked up along the way. This is why a balanced run can travel 50 feet past power cables and stay dead quiet.
Why unbalanced cables hum
An unbalanced cable (a standard TS instrument cable or RCA) has no second conductor to cancel interference, so over long distances it acts like an antenna and picks up hum and buzz. Keep unbalanced runs short — a guitar-to-amp cable is fine; a 30-foot unbalanced run is asking for noise.
Which cable for which job
- XLR (balanced): microphones and long line runs — use a Mogami Gold XLR or Amazon Basics XLR.
- TRS (balanced): interface-to-monitor connections; looks like a headphone plug but carries a balanced signal.
- TS (unbalanced): guitars and short instrument runs only.
Summary
Use balanced XLR or TRS for mics and monitors, keep unbalanced TS cables short, and most hum problems disappear. Connect your mic to a quality audio interface with balanced outputs to your studio monitors for the cleanest path.