Cable Microfono XLR: The Mic Cable Spec
Microphone cables carry the quietest signals in audio, plus 48 volts for condensers. Build quality is audible here more than anywhere else.
Quick Answer
| Element | Standard | Why |
|---|---|---|
| Conductors | Two, twisted pair | Balanced rejection |
| Shield | Braid or spiral, high coverage | RF and hum defence |
| Connectors | XLR three pin, metal shell | Locking, durable |
| Capacitance | Low, per spec | Preserves top end on long runs |
| Rating | Handles 48 V phantom | Condenser microphones |
Why Balanced Matters for Mics
Microvolts of signal
Mic output is tiny; noise injection would swamp it without balance.
Phantom path
Both conductors carry the 48 V equally; miswiring disturbs it.
Long studio runs
Ten to thirty metre runs stay quiet when built properly.
Handling noise
Microphonic cable noise is audible on quiet sources. Dense shields help.
Care and Testing
- Over under coil to protect the conductors.
- Test suspected cables with continuity, not guesswork.
- Clean locking collars occasionally.
- Keep phantom off when plugging unbalanced adapters.
- Retire crackling cables; mic duty forgives nothing.
Real-World Applications
- Studio vocal and instrument miking.
- Live stage vocal channels.
- Broadcast and podcast rigs.
- Location recording kits.
Related Guides
For the input side, read XLR input guide. For wiring and soldering, see XLR connection guide. For selection by use, start with XLR mic cable guide.
FAQ
Are all XLR cables mic cables?
Not exactly; speaker and DMX use similar connectors with different builds.
Does length hurt mic signals?
Balanced construction keeps long runs quiet.
Why does my cable crackle?
Failing joint or shield. Retire it from mic duty.
Do I need premium cable?
Proper spec is the bar; premium buys durability.