1. Introduktion
The Shure BETA 58A is a high-output supercardioid dynamic vocal microphone engineered for professional sound reinforcement and studio recording applications. It is designed to provide clear, natural-sounding vocals with excellent feedback rejection and minimal off-axis sound pickup. Its robust construction ensures reliable performance in various environments.
Image 1.1: The Shure BETA 58A Vocal Microphone, showcasing its distinctive grille and body design.
2. Hvad er der i æsken
Kontroller, at alle komponenter er til stede ved udpakning:
- 1 x Shure BETA 58A wired microphone
- 1 x A25D Adjustable Stand Adapter
- 1 x 95A2050 5/8” to 3/8” (Euro) Thread Adapter
- 1 x 26A21 Storage Bag
Image 2.1: Shure BETA 58A microphone, its packaging, stand adapter, thread adapter, and storage bag.
3. Opsætning
Follow these steps to set up your Shure BETA 58A microphone:
- Fastgør stativadapteren: Secure the A25D Adjustable Stand Adapter to a microphone stand. If your stand has a 3/8” thread, use the included 95A2050 5/8” to 3/8” (Euro) Thread Adapter.
- Monter mikrofonen: Insert the Shure BETA 58A microphone into the stand adapter. The adapter allows for 180-degree adjustment.
- Tilslut kablet: Connect a standard XLR microphone cable to the XLR connector at the base of the microphone. Ensure a secure connection.
- Tilslut til lydmixer: Plug the other end of the XLR cable into an appropriate microphone input on your audio mixer or recording interface.
Image 3.1: The Shure BETA 58A microphone properly mounted on a stand, ready for use.
Image 3.2: Close-up of the XLR connector at the base of the Shure BETA 58A microphone.
4. Betjeningsvejledning
The BETA 58A is optimized for vocal performance. Consider the following for optimal operation:
- Mikrofonplacering: For best results with vocals, position the microphone close to the sound source. The tailored frequency response is ideal for close-up vocal use, controlling the proximity effect.
- Supercardioid Pattern: The uniform supercardioid polar pattern provides high gain before feedback and superior rejection of off-axis sound. This means the microphone primarily picks up sound directly in front of it, minimizing unwanted noise from the sides and rear.
- Signal-to-Noise Output: The neodymium magnet contributes to a high signal-to-noise output, ensuring clear audio reproduction.
- Belastningsimpedans: The microphone's performance is minimally affected by varying load impedance, ensuring consistent sound quality across different audio systems.
Image 4.1: A user performing with the Shure BETA 58A microphone, demonstrating typical handheld use.
5. Vedligeholdelse
Proper maintenance ensures the longevity and performance of your BETA 58A microphone:
- Rengøring af gitter: The hardened steel mesh grille is designed to resist wear and abuse. Periodically clean the grille with a soft, dry cloth to remove dust and debris. For stubborn grime, a slightly damp cloth can be used, ensuring no moisture enters the microphone capsule.
- Opbevaring: When not in use, store the microphone in the provided 26A21 Storage Bag to protect it from dust and physical damage.
- Undgå påvirkning: While rugged, avoid dropping or subjecting the microphone to severe impacts to prevent internal damage.
Billede 5.1: Detaljeret view of the BETA 58A's durable steel mesh grille.
6. Fejlfinding
If you encounter issues with your BETA 58A, consider the following:
- Ingen lydoutput:
- Sørg for, at XLR-kablet er korrekt tilsluttet til både mikrofonen og lydmixeren/interfacet.
- Verify that the input channel on your mixer is active and its gain is appropriately set.
- Test med et andet XLR-kabel for at udelukke kabelfejl.
- Feedback (High-Pitched Squeal):
- Reposition the microphone further away from loudspeakers or monitors.
- Reduce the gain on the mixer channel.
- Utilize the supercardioid pattern by ensuring the microphone is pointed directly at the sound source and away from sound reinforcement speakers.
- Forvrænget lyd:
- Lower the input gain on your mixer to prevent clipping.
- Sørg for, at mikrofonen ikke overbelastes af for høje lydkilder.
- Overdreven håndteringsstøj:
- The advanced pneumatic shock mount system minimizes mechanical noise. If excessive noise persists, ensure the microphone is properly seated in the stand adapter.
- Consider using a higher-quality microphone stand that absorbs vibrations more effectively.
7. Specifikationer
| Feature | Specifikation |
|---|---|
| Polar mønster | Supercardioid, rotationally symmetrical about microphone axis, uniform with frequency. |
| Udgangsniveau (ved 1,000 Hz) | Open Circuit Voltage: -51.5 dBV/Pa* (2.6 mV) *1 Pa = 94 dB SPL |
| Impedans | Rated impedance is 150 ohms (290 ohms actual) for connection to microphone inputs rated low Z. |
| Phasing | Positivt tryk på membranen giver positiv voltage på ben 2 i forhold til ben 3. |
| Sag | Silver blue enamel-painted die cast metal with hardened, matte-finished, spherical steel mesh grille. |
| Justerbar stativadapter | Slip-in microphone mounting, unbreakable, adjustable through 180 degrees with standard 5/8"-27 thread, black finish. |
| Vægt | 9.92 ounce (281 gram) |
| Produktmål (L x B x H) | 6.5 x 2 x 2 tommer (16.5 x 5.1 x 5.1 cm) |
| Signal-støjforhold | 72 dB |
| Fabrikant | Shure |
| Modelnavn | BETA 58A |
| Forbindelsesteknologi | Kablet (XLR) |
8. Garanti og support
The Shure BETA 58A microphone is backed by Shure's commitment to quality and reliability. A 2 års begrænset garanti is typically provided from the date of purchase, covering defects in materials and workmanship under normal use.
For technical support, warranty claims, or service inquiries, please refer to the official Shure website or contact your authorized Shure dealer. Keep your proof of purchase for warranty validation.
