1. Introduction
The Shure KSM9/CG is a premium vocal condenser microphone engineered for demanding live performance environments. It is designed to capture vocal subtleties with extraordinary detail, delivering clear articulation and precise vocal reproduction. Featuring a dual diaphragm design and switchable polar patterns, the KSM9/CG offers functional flexibility for various sound reinforcement applications.
Image 1.1: The Shure KSM9/CG Charcoal Grey vocal condenser microphone.
2. Key Features
The Shure KSM9/CG microphone incorporates several advanced features to ensure high-quality audio performance:
- Exceptional Frequency Consistency: Provides more gain before feedback and reduced proximity effect across all frequencies.
- Dual Diaphragm Design: Features dual gold-layered, low-mass Mylar diaphragms for superior frequency response.
- Switchable Polar Patterns: Offers both supercardioid and cardioid patterns for maximum flexibility in various performance applications.
- Advanced Shock Mount: An advanced suspension shock mount system isolates the cartridge from handling and stand noise.
- Premium Electronics: Includes Class A, discrete, transformerless preamplifier circuitry for transparent, fast transient response with minimal distortion.
3. What's in the Box
Upon opening your Shure KSM9/CG package, you should find the following items:
- Shure KSM9/CG Vocal Condenser Microphone
- Aluminum Carrying Case
- Microphone Clip
Image 3.1: Contents of the Shure KSM9/CG package, including the microphone, carrying case, and clip.
4. Setup
4.1. Connecting the Microphone
- Ensure your audio mixer or interface is powered off before connecting the microphone.
- Connect the XLR output of the KSM9/CG microphone to an available XLR input on your mixer or audio interface using a standard XLR cable.
- The KSM9/CG is a condenser microphone and requires 48V phantom power to operate. Activate phantom power on the connected input channel of your mixer or interface. Refer to your mixer's manual for instructions on enabling phantom power.
- Power on your audio mixer or interface.
4.2. Polar Pattern Selection
The KSM9/CG features a switch to select between two polar patterns: cardioid and supercardioid. This switch is typically located on the microphone body. Select the appropriate pattern based on your performance environment and desired sound isolation.
Image 4.1: Front view of the Shure KSM9/CG, highlighting the microphone's design and branding.
5. Operation
5.1. Understanding Polar Patterns
- Cardioid: This pattern picks up sound primarily from the front of the microphone, with good rejection from the sides and rear. It provides excellent sound isolation and gain before feedback, with minimal off-axis coloration. Ideal for general vocal use in controlled environments.
- Supercardioid: This pattern is narrower than cardioid, offering even greater rejection from the sides and a small lobe of sensitivity directly at the rear. It provides maximum sound isolation and is ideal for applications with high levels of ambient noise or when multiple sound sources are close together, helping to minimize bleed from other instruments or vocalists.
5.2. Microphone Placement
Proper microphone placement is crucial for optimal sound quality. Experiment with the distance and angle to the sound source to achieve the desired tone and minimize unwanted noise. For vocals, typically hold the microphone 2-6 inches from the mouth.
6. Maintenance
- Cleaning: Wipe the microphone body with a soft, dry cloth. For the grille, use a soft brush to remove debris. Avoid using liquid cleaners directly on the microphone.
- Storage: Store the microphone in its aluminum carrying case when not in use to protect it from dust, moisture, and physical damage.
- Handling: Handle the microphone with care. Avoid dropping it or exposing it to extreme temperatures or humidity.
7. Troubleshooting
7.1. No Sound Output
- Check Connections: Ensure all XLR cables are securely connected between the microphone and the audio input.
- Phantom Power: Verify that 48V phantom power is enabled on the input channel connected to the microphone. Condenser microphones will not operate without it.
- Input Gain: Confirm that the input gain on your mixer or interface is set appropriately and not turned down completely.
- Cable Integrity: Test with a different XLR cable to rule out a faulty cable.
7.2. Distorted Sound
- Input Gain: Reduce the input gain on your mixer or interface if the signal is clipping or distorting.
- Proximity: If the sound is boomy or distorted due to proximity effect, increase the distance between the microphone and the sound source.
- Polar Pattern: Ensure the selected polar pattern is suitable for the environment and sound source.
7.3. Feedback
- Microphone Placement: Reposition the microphone further away from loudspeakers or monitors.
- Polar Pattern: Utilize the supercardioid pattern for maximum rejection of off-axis sounds, especially from monitors.
- Gain Reduction: Lower the overall gain on the input channel or main output.
8. Specifications
| Specification | Value |
|---|---|
| Cartridge Type | Condenser (Electret Biased) |
| Frequency Response | 50 to 20,000 Hz |
| Output Impedance | 150 ohms (actual) |
| Phantom Power Requirement | 48 Vdc +/- 4 Vdc (IEC-268-15/DIN 45 596) |
| Current Drain | 5.2 mA typical at 48 Vdc |
| Polar Patterns | Cardioid, Supercardioid |
| Sensitivity (typical; at 1000 Hz; 1 Pa = 94 dB SPL) | -51 dBV/Pa |
| Self-noise (A-weighted, IEC 651) | 22 dB |
| Maximum SPL @ 1000 Hz (2500 ohm load) | 152 dB |
| Dynamic Range (2500 ohm load) | 130 dB |
| Signal to Noise ratio | 72 dB |
| Weight | 300 grams (10.6 oz) |
| Dimensions (L x Max Body Dia.) | 191 mm (7.5 in.) x 49 mm (1 15/16 in.) |
| Material | Aluminum |
| Color | Charcoal Grey |
9. Warranty and Support
For warranty information, technical support, or service inquiries regarding your Shure KSM9/CG microphone, please refer to the official Shure website or contact Shure customer service directly. Keep your proof of purchase for warranty claims.
You can visit the official Shure website for more information: www.shure.com
