Sennheiser SKP 500 G4 Pro Wireless Plug-On Transmitter (AW+: 470 to 558 MHz)

The Sennheiser 509545 is a wireless plug-on transmitter designed to deliver professional audio performance in a durable and compact package. It works well for film production, live stage events, and presentations where clear, reliable sound transmission is essential. This transmitter operates within a wide UHF frequency range from 470 to 558 MHz, offering up to 32 channels across an 88 MHz bandwidth, which helps avoid interference and ensures stable connections in busy RF environments.

It pairs easily with compatible Sennheiser receivers and handheld microphones, giving you flexibility in how you set up your audio system. The transmitter supports both dynamic and condenser microphones thanks to its switchable 48V phantom power, making it suitable for a variety of mic types. The backlit LCD display keeps you informed with real-time information on frequency, audio levels, battery life, and channel status, so you can monitor your setup at a glance.

With a transmission range of up to 330 feet and adjustable RF output power settings (10, 30, or 50 mW), the 509545 adapts to different venues and distances, whether you’re working in a small studio or a large auditorium. It runs for about 8 hours on two AA batteries, or you can use an optional Sennheiser battery pack for extended sessions. The built-in HDX compander technology reduces noise and improves the signal-to-noise ratio, ensuring your audio remains clear and professional throughout your performance or recording.

This transmitter is a reliable choice for audio professionals who need a versatile, easy-to-use wireless solution that performs consistently in demanding environments.

Highlights:

• Operates within an 88 MHz bandwidth with up to 32 channels
• Transmission range up to 330 feet for flexible placement
• Switchable 48V phantom power supports dynamic and condenser microphones
• Adjustable RF output power at 10, 30, or 50 mW to suit different environments
• Provides approximately 8 hours of operation on two AA batteries
• Backlit LCD display shows frequency, audio level, battery status, and channel information
• Compact and durable design built for professional use