What is Dynamic Microphone?
A dynamic microphone uses electromagnetic induction to convert sound waves into electrical signals. Inside, a thin diaphragm attached to a coil of wire moves within a magnetic field when sound hits it, generating an electrical current. This simple, rugged design makes dynamic mics incredibly durable and versatile.
Dynamic microphones are prized in podcasting for their:
- Noise rejection: Less sensitive to room noise and background sounds
- Durability: Can handle rough treatment and loud sounds
- No phantom power needed: Work with any preamp or interface
- Warm, broadcast sound: Natural voice reproduction
| Dynamic Mic | Character | Needs Preamp Boost? | Price |
|---|---|---|---|
| Shure SM7B | Smooth broadcast | Yes (60dB+ gain) | ~$400 |
| Shure SM58 | Stage-proven classic | Moderate | ~$100 |
| Rode PodMic | Podcast-optimized | Moderate | ~$100 |
| Electro-Voice RE20 | Radio broadcast | Moderate | ~$450 |
| Shure MV7 | Modern hybrid | No (has USB) | ~$250 |
Why It Matters
Dynamic microphones are the secret weapon for podcasters recording in less-than-ideal acoustic environments. Their lower sensitivity means they pick up less room echo, keyboard noise, and HVAC sounds compared to condenser microphones. This is why the Shure SM7B has become the iconic "podcast microphone"—it sounds professional even in untreated home studios.
How to Use This in Dispatch
Dynamic mics need to be close—position yours 2-4 inches from your mouth for the best sound. Because they're less sensitive, you'll need more gain from your preamp than with a condenser. Some dynamic mics (like the SM7B) benefit from a Cloudlifter or similar inline preamp for cleaner gain. Always speak directly into the front of the mic, not the top.