AKG C391 B High Performance Condenser Microphone
Description
AKG C391 B High Performance Condenser Microphone
The AKG C391 B is a compact cardioid condenser built for live performance and studio recording. Its lightweight, ergonomic design—just 115 grams and 146 mm in length—mounts securely on any stage rig or sits comfortably in a compact recording setup. The microphone captures transparent, detailed audio with excellent feedback rejection, rewarding careful mic technique with honest, studio-quality results you can rely on night after night.
Audio Performance
A flat 20–20,000 Hz frequency response ensures accurate reproduction across the full spectrum, while the 77 dB-A signal-to-noise ratio and 17 dB-A equivalent noise level keep background noise minimal in demanding live and recording environments. Maximum SPL handling of 132 dB (1% T.H.D.) or 142 dB with the 10 dB pad engaged gives you headroom for loud sources without distortion, whether you're miking an amp or capturing close-range vocals.
Design & Connectivity
The cardioid polar pattern provides controlled pickup and natural rejection of off-axis sound, critical for isolating your source and minimizing stage bleed. A switchable 10 dB preattenuation pad and 12 dB/octave high-pass filter below 75 Hz offer quick corrective tools for problem frequencies, while the modular capsule system allows future customization as your needs evolve. Balanced XLR 3-pin connection with 9–52 V phantom power compatibility integrates seamlessly into standard professional signal chains and touring rigs.
Key Features
- Cardioid condenser microphone with precise directional pickup
- Frequency range: 20–20,000 Hz
- Sensitivity: 10 mV/Pa
- Maximum SPL: 132 dB (1% T.H.D.) / 142 dB with pad engaged
- Signal-to-noise ratio: 77 dB-A
- Equivalent noise level: 17 dB-A
- Switchable 10 dB preattenuation pad
- Switchable 12 dB/octave high-pass filter (below 75 Hz)
- Phantom power: 9–52 V, 2 mA current draw
- Balanced XLR male 3-pin connection; 200 ohm impedance
- Compact dimensions: 19 mm diameter × 146 mm length; 115 g weight
- Modular design with interchangeable capsule system
The C391 B combines precision engineering with practical flexibility, delivering the transparent, artifact-free sound that live performance and studio recording demand—built tough enough to handle whatever your setlist throws at it.
More Information
| Condition | New |
|---|
Reviews
At a Glance
The AKG C391 B is a compact cardioid condenser built for stage and studio use, weighing just 115 grams with a transparent, detailed sound that captures vocals and acoustic instruments without coloration. Its switchable 10 dB pad and high-pass filter handle everything from delicate vocal lines to loud drum sources, while excellent feedback rejection keeps your signal clean in live settings. Choose it when you need professional-grade clarity in a lightweight, road-ready package that doesn't demand studio conditions to deliver honest results.
Who This Is For
Great for
- ✓ Studio Sessions
- ✓ Home Recording
- ✓ Live Performance
- ✓ Vocal Recording
- ✓ Acoustic Instruments
Not the best pick for
- – Beginner Practice
- – Casual Podcasting
Skill level: Intermediate · Advanced · Professional
Frequently Asked Questions
What is the signal-to-noise ratio and equivalent noise level?
The C391 B has a 77 dB-A signal-to-noise ratio and 17 dB-A equivalent noise level, ensuring minimal background noise in demanding recording environments and live settings.
Can it handle loud sources like drums or guitar amps?
Yes. Maximum SPL is 132 dB (1% T.H.D.) at standard setting, or 142 dB with the switchable 10 dB pad engaged, giving you plenty of headroom for loud sources without distortion.
What are the switchable controls and how do they work?
The microphone includes a switchable 10 dB preattenuation pad to manage loud sources and a 12 dB/octave high-pass filter below 75 Hz to reduce rumble and proximity bass.
What kind of polar pattern and rejection does it have?
The cardioid polar pattern provides controlled pickup with natural rejection of off-axis sound, offering excellent feedback rejection critical for live and mixed recording environments.
Is the capsule user-replaceable or customizable?
Yes, the modular capsule system allows future customization and interchangeability, extending the microphone's versatility over time.