Sennheiser 509541

Overview

The Sennheiser 509541 is a wireless bodypack transmitter designed to provide reliable and high-quality audio transmission for professional applications such as presentations, live performances, and educational settings. Operating within the 470 to 558 MHz frequency range, it supports up to 32 channels across an 88 MHz bandwidth, ensuring clear and interference-free audio over distances up to 330 feet. Its compact metal casing offers durability and comfort for extended use, making it a practical choice for demanding environments.

Key features

• Supports up to 32 channels within an 88 MHz bandwidth to minimize interference and allow flexible frequency selection
• Selectable RF power output levels of 10, 30, or 50 mW to maintain a strong and stable signal in various environments
• Locking 3.5mm audio input ensures secure and consistent microphone connections
• Infrared sync function simplifies pairing with compatible Sennheiser receivers, speeding up setup time
• Backlit LCD display provides real-time information on signal strength, audio levels, and battery status for easy monitoring
• Runs on two AA batteries or an optional rechargeable battery pack, delivering up to 8 hours of continuous operation
• Optional remote mute switch offers convenient control over audio without interrupting performance
• Backward-compatible with earlier evolution series devices, allowing seamless integration into existing Sennheiser systems

Key specs

• Frequency range: 470 to 558 MHz
• Channel capacity: up to 32 channels
• Bandwidth: 88 MHz
• Transmission range: up to 330 feet
• RF power output: selectable 10, 30, or 50 mW
• Audio input: locking 3.5mm jack
• Power source: two AA batteries or optional rechargeable pack
• Battery life: up to 8 hours
• Display: backlit LCD

Connectivity and compatibility

This transmitter is designed to work seamlessly with a wide range of Sennheiser lavalier and headworn microphones, providing flexibility for different audio setups. Its locking 3.5mm input ensures a secure connection to microphones, reducing the risk of accidental disconnection during use. The infrared sync feature allows quick and accurate pairing with compatible Sennheiser receivers, streamlining the setup process in busy professional environments.

Performance and reliability

With selectable RF power output levels, the transmitter can adapt to various venue sizes and RF conditions, maintaining a stable and clear audio signal even in areas with heavy radio frequency activity. The robust metal casing protects the unit from daily wear and tear, while the backlit LCD display keeps users informed about critical parameters such as signal strength and battery life. This combination of features ensures dependable performance throughout long events or multiple sessions.

Ideal uses and environments

The Sennheiser 509541 fits well in professional settings where wireless audio quality and reliability are essential. It is a strong choice for corporate presentations, theatrical productions, educational lectures, and live performances. Its compatibility with existing Sennheiser evolution series equipment makes it suitable for users upgrading their systems without replacing all components. The transmitter’s long battery life and flexible power options support extended use in demanding scenarios.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

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Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

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

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

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.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

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