The five you will meet
TS (one ring) — instrument to amplifier, unbalanced. TRS (two rings) — balanced line, monitors, and stereo headphones. XLR — microphones, balanced, carries phantom power. RCA — consumer line level, common on desktop speakers. USB — data and power, for interfaces and USB microphones.
The two mix-ups that silence a setup
A microphone into a line input is silent or nearly so; use the microphone input on the combo socket. A TS cable into a balanced monitor input works and hums, because the balanced connection is lost.
What an adapter costs you
An XLR-to-jack adapter passes audio and does not pass phantom power, so a condenser microphone stays completely silent through one. Adapters between 6.35 mm (0.25 in) and 3.5 mm (0.14 in) are harmless.
Buy the length you need plus one meter
And no more, on anything unbalanced. Spare length is an aerial.
The questions players ask
How do I tell TS from TRS?
Count the black rings on the plug. One ring is TS, mono and unbalanced — instruments. Two rings is TRS, balanced or stereo — monitors and line signals.
Is a longer cable worse?
On an unbalanced instrument cable, yes: more interference and less high end as it gets longer. On a balanced XLR or TRS run, length is far less of an issue.
Last reviewed 2026-08-18
