Sennheiser 509640

Overview

The Sennheiser 509640 is a wireless lavalier microphone system designed to provide presenters, moderators, and instructors with the freedom to move while maintaining clear and intelligible audio. Featuring a compact bodypack transmitter paired with the ME 4 clip-on cardioid microphone and a true diversity receiver housed in a robust metal enclosure, this system ensures reliable sound quality that cuts through ambient noise. With a 42 MHz tuning range offering 1680 selectable UHF frequencies and a transmission range of up to 100 meters, it supports up to 20 simultaneous channels, making it ideal for multi-speaker events in various professional settings.

Key features

• ME 4 cardioid lavalier microphone delivers focused sound pickup, reducing background noise for clearer speech.
• True diversity receiver enhances signal stability and minimizes dropouts, even in challenging RF environments.
• Wide 42 MHz bandwidth with 1680 selectable frequencies allows flexible channel selection to avoid interference.
• Supports up to 20 compatible systems operating simultaneously, perfect for events with multiple speakers.
• Infrared link enables quick and easy synchronization between transmitter and receiver, simplifying setup.
• Adjustable RF output power up to 30 mW ensures strong transmission and resistance to interference.
• Compact bodypack transmitter offers hands-free convenience and comfortable wear during presentations.
• Back-lit LCD interface on the receiver provides clear visibility of settings in low-light conditions.
• Durable metal housing for the receiver ensures long-lasting performance and protection in professional environments.

Key specs

• Tuning range: 42 MHz
• Selectable UHF frequencies: 1680
• Maximum simultaneous channels: 20
• Transmission range: up to 100 meters
• RF output power: adjustable up to 30 mW
• Microphone type: ME 4 cardioid lavalier
• Receiver type: true diversity in metal enclosure

Connectivity and compatibility

The system integrates seamlessly with professional sound setups through standard audio outputs on the receiver, making it compatible with a wide range of mixers, amplifiers, and PA systems. Its robust UHF transmission ensures stable connections in environments with multiple wireless devices, such as conference centers and theaters.

Installation and setup

Setting up the system is straightforward: the receiver can be rack-mounted using the included kit, while the bodypack transmitter pairs quickly via infrared synchronization. The lavalier microphone clips discreetly onto clothing, allowing users to focus on their presentation without worrying about cables or signal interruptions.

Ideal uses and environments

This wireless lavalier system is well suited to conference rooms, lecture halls, houses of worship, video productions, and small theaters where clear speech and dependable wireless performance are essential. It supports speakers who need mobility and reliable audio quality in busy RF environments, making it a strong choice for professional presenters and event organizers.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

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After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

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If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

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