Introducció
The AKG C 451 B is a small-diaphragm condenser microphone, known for its clear and airy sound. It is a modern iteration of the classic C451 EB + CK1 capsule, first introduced in 1969. This microphone is designed for high-quality audio capture, offering a high overload limit and robust construction suitable for various recording environments, including demanding live sound applications. Its low-noise preamp electronics ensure reliable performance.
Image: The AKG C 451 B small-diaphragm condenser microphone, shown with its nickel finish and integrated stand adapter.
Característiques clau
- Acoustical Performance: Delivers stunning sound quality with maximum accuracy, replicating the legendary C451 EB + CK1 capsule.
- Roadworthy Design: An established tour sound standard since the 1980s, ensuring excellent sound quality even under harsh on-stage condicions.
- High SPL Capability: Impressive sound pressure level capability of 155dB SPL allows close-miking of high-energy sound sources without distortion.
- Effective High-Pass Filter: Features a highly effective high-pass filter with 12dB/octave to prevent low-end distortion caused by rumble or wind noise.
- Low Distortion Preamp: Pre sense transformadoramp and surface mount technology provide extremely low distortion, high reliability, and reduced weight.
Configuració
- Desembalatge: Carefully remove the C 451 B microphone and any included accessories from its packaging. The package typically includes the microphone itself.
- Muntatge: Attach the microphone to a suitable microphone stand using the provided stand adapter. Ensure it is securely fastened.
- Connexió: Connect the microphone to your audio interface, mixer, or preamplifier using a balanced XLR cable. The C 451 B requires 48V phantom power to operate. Verify that your connected device can supply this power and activate it.
- Posicionament: Position the microphone according to your recording or live sound needs. For instruments, experiment with distance and angle to achieve the desired sound.
Imatge: Primer pla view of the AKG C 451 B microphone, highlighting the XLR connector at the base and the switches for pad and high-pass filter.
Operating the C 451 B
The AKG C 451 B features switches on its body to adjust its response for various recording situations.
- Filtre de pas alt: The microphone includes a switchable high-pass filter (bass cut) with a slope of 12dB/octave. This filter helps to reduce unwanted low-frequency noise such as rumble, stage vibrations, or wind noise.
- Flat (0): No high-pass filtering applied.
- 75 Hz: Engages a high-pass filter at 75 Hz.
- 150 Hz: Engages a high-pass filter at 150 Hz.
- Pre-attenuation Pad: The C 451 B is equipped with a switchable pre-attenuation pad to handle very loud sound sources without overloading the microphone's electronics or the input of your preampmés viu.
- 0 dB: No attenuation applied.
- -10 dB: Reduces the microphone's output by 10 dB.
- -20 dB: Reduces the microphone's output by 20 dB.
Always ensure phantom power is supplied to the microphone for proper operation.
Manteniment
- Neteja: Feu servir un drap suau i sec per netejar el cos del micròfon. Eviteu utilitzar netejadors líquids o dissolvents, ja que poden danyar l'acabat o els components interns.
- Emmagatzematge: When not in use, store the microphone in its protective case or a clean, dry environment to prevent dust accumulation and physical damage.
- Manipulació: Handle the microphone with care. Avoid dropping it or subjecting it to strong impacts, which can affect its delicate internal capsule.
- Condicions ambientals: Protect the microphone from extreme temperatures, high humidity, and direct moisture.
Resolució de problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Sense sortida de so | No phantom power; faulty cable; incorrect input selection on mixer/interface. | Ensure 48V phantom power is enabled. Check XLR cable for damage. Verify correct input channel is selected and gain is adjusted. |
| So distorsionat | Input overload (too loud source); pre-attenuation pad not engaged; excessive gain. | Engage the -10 dB or -20 dB pre-attenuation pad. Reduce the gain on your preamplifier or mixer. Move the microphone further from the sound source. |
| Excessive low-frequency noise (rumble) | Stage vibrations; wind noise; proximity effect. | Engage the high-pass filter (75 Hz or 150 Hz). Use a shock mount to isolate vibrations. Use a windscreen for outdoor or windy conditions. |
| Senyal feble o inconsistent | Faulty cable; insufficient phantom power; damaged microphone. | Try a different XLR cable. Confirm stable 48V phantom power supply. If issues persist, contact AKG support. |
Especificacions
| Característica | Detall |
|---|---|
| Factor de forma del micròfon | Diafragma petit |
| Patró polar | Unidireccional |
| Tecnologia de connectivitat | Amb cable |
| Tipus de connector | XLR equilibrat |
| Font d'alimentació | Corded Electric (48V Phantom Power) |
| Sensibilitat d'àudio | 155 Decibels (Max SPL) |
| Ràtio senyal / soroll | 76 dB |
| Resposta de freqüència | 20 Hz - 20 kHz |
| Pes de l'article | 1.19 lliures (aprox. 0.54 kg) |
| Dimensions del producte (L x A x A) | 11.7 x 5.9 x 3.5 polzades (aprox. 29.7 x 15 x 8.9 cm) |
| Material | Acer inoxidable |
| Color | Níquel |
| Components inclosos | Micròfon |
Garantia i Suport
Per obtenir informació sobre la garantia i assistència tècnica, consulteu la pàgina oficial d'AKG. website or contact your authorized AKG dealer. Keep your proof of purchase for warranty claims.
Recursos en línia: Visita el AKG Store on Amazon per obtenir informació addicional sobre el producte i accessoris.
