Join Bill Gibson for an in-depth discussion in this video Impedance, part of Microphone Techniques: Essentials.
- Now when we consider impedance on a microphone … this Shure SM57 says it's impedance is 150 ohms. … Most microphones that are professional microphones … have a balanced output anywhere … from 50 ohms up to 1,000 ohms. … Almost all of them fit between 50 ohms and 600 ohms. … What we need to take away from that information … is just that we connect those microphones … to inputs that are also low impedance inputs. … Those impedance's don't need to match exactly. … In fact, for a 150 ohm microphone output, … you might see a spec that says … it's ideal to connect it to a 1500 ohm input. … 1500 ohm input is still low impedance. … High impedance starts around 10 or 20,000 ohms … and it doesn't work to connect low impedance devices … with high impedance inputs, or vice versa, … high impedance devices with low impedance inputs. … There are some pre empts that actually … let you set the the pre empt input impedance manually … so that you can specifically match … the pre empt input to the microphone output. …
- Wireless mics
- Handling noise
- Operating principles
- Shaping the pickup pattern
- Operating condenser
- Using high-pass filters
- Evaluating mics and mic specs
Skill Level Beginner
Video Production: Location Audio Recordingwith Anthony Q. Artis1h 23m Intermediate
Pro Tools: Audio for Film and Videowith Scott Hirsch5h 9m Intermediate
1. Microphone Fundamentals
2. Operating Principles
3. Understanding Mic Specs
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