Sennheiser MMD 845-1 Dynamic Supercardioid Microphone Module

Introduction

The Sennheiser MMD 845-1 is a dynamic supercardioid microphone module designed for use with Sennheiser G3 or 2000 Series SKM handheld wireless transmitters. This module features an E845 supercardioid dynamic vocal microphone capsule, engineered to handle high sound pressure levels and effectively reject feedback. Its robust design includes a metal grille, ensuring durability and reliable performance. The MMD 845-1 is designed for quick and tool-free installation, making it a convenient solution for replacing existing capsules or upgrading your wireless microphone system.

Image of the Sennheiser MMD 845-1 microphone module, showcasing its design and compact size.

Setup

1. Installation: The MMD 845-1 capsule is easily installed without the need for tools. Simply screw the module onto your compatible Sennheiser SKM835, G3, or SKM 2000 series handheld wireless transmitter. Ensure it is securely fastened.
2. Frequency Scanning: To establish a wireless connection, power on both the transmitter (microphone) and the receiver. On the receiver unit, locate and activate the frequency scanning function. This will identify available, clear frequencies in your operating environment.
3. Frequency Selection: Once the scan is complete, select a free frequency from the options displayed on the receiver. Alternatively, you can manually set a specific frequency if desired.
4. Syncing: With a frequency selected on the receiver, press the 'Sync' button on the receiver unit. Then, hold the microphone module close to the receiver's infrared (IR) port. The receiver will transmit the selected frequency information to the microphone, establishing a synchronized connection.

Operating

• Supercardioid Pickup Pattern: The MMD 845-1 features a supercardioid pickup pattern, which is highly effective at capturing sound directly in front of the microphone while significantly rejecting sounds from the sides. This characteristic is beneficial for minimizing feedback and unwanted ambient noise, ensuring clear vocal reproduction.
• Adjustable Settings: The microphone module includes small, discreet controls that allow you to navigate a menu on the transmitter. Through this menu, you can adjust various settings, such as the microphone's sensitivity, to optimize performance for different vocalists or sound environments.
• Secure Power Button: The power on/off function is controlled by a small red button located at the back of the module. This design prevents accidental power-offs during performances or critical use.
• Interchangeable Capsules: A key feature of this system is the ability to change microphone capsules. The MMD 845-1 capsule can be easily unscrewed and replaced with other compatible Sennheiser capsules, such as cardioid or other specialized types. This allows for flexibility in sound characteristics to suit different applications or preferences.

Maintenance

• Cleaning: Regularly wipe the microphone module with a soft, dry cloth to remove dust and debris. For the metal grille, a slightly damp cloth can be used, ensuring no moisture enters the microphone capsule.
• Storage: When not in use, store the microphone module in a protective case to prevent physical damage and exposure to dust or extreme temperatures.
• Battery Care: If your transmitter uses removable batteries, ensure they are replaced as needed and disposed of properly. For rechargeable systems, follow the manufacturer's guidelines for charging and battery maintenance.

Troubleshooting

• No Sound: Check that both the microphone transmitter and receiver are powered on and properly synchronized. Verify that the audio cables are correctly connected from the receiver to your sound system. Ensure the microphone's sensitivity settings are not too low.
• Interference/Dropouts: Rescan for a clear frequency in your environment. Ensure there are no obstructions between the transmitter and receiver. Check for other wireless devices operating on similar frequencies that might cause interference.
• Feedback: Adjust the microphone's position relative to loudspeakers. Utilize the supercardioid pattern by speaking directly into the front of the microphone. Lower the gain on your mixer or receiver if necessary.
• Microphone Not Turning On: Check the battery level of the transmitter. If using disposable batteries, replace them. If rechargeable, ensure it is fully charged.

Specifications

Warranty and Support

For warranty information and technical support, please refer to the documentation included with your complete Sennheiser wireless system or visit the official Sennheiser website. Keep your proof of purchase for warranty claims.