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Sennheiser 509501 Pro Audio Bodypack Transmitter — main product image
Sennheiser 509501 Pro Audio Bodypack Transmitter
Sennheiser 509501 Pro Audio Bodypack Transmitter
Sennheiser 509501 Pro Audio Bodypack Transmitter
Sennheiser 509501 Pro Audio Bodypack Transmitter
Sennheiser 509501 Pro Audio Bodypack Transmitter
Sennheiser 509501 Pro Audio Bodypack Transmitter
Sennheiser

Sennheiser 509501 Pro Audio Bodypack Transmitter

Professional UHF bodypack transmitter with rugged metal build and reliable wireless audio for presenters and performers.

$296.10*
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*Price sourced from Amazon.com. Last updated:Aug 27, 2026.Price and availability are subject to change — details.

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Overview

The Sennheiser SK 100 G4-A is a professional-grade UHF bodypack transmitter built for reliable wireless audio in demanding environments. Constructed with a rugged metal housing, it is designed to endure the rigors of live performance, broadcast, and corporate presentation use. The transmitter operates within the A frequency band (516–558 MHz) and pairs with Sennheiser's ew 100 G4 series receivers, offering a proven wireless ecosystem with robust RF performance and clear audio transmission.

Setup is straightforward thanks to an easy-to-navigate display and intuitive controls that allow quick frequency selection and sync with compatible receivers. The 1/8-inch ew locking connector ensures a secure, rattle-free connection with Sennheiser lavalier and headset microphones, as well as third-party options that use the same connector. The compact form factor clips unobtrusively to a belt or waistband, making it suitable for on-camera talent, theater performers, and public speakers. Powered by two AA batteries, it delivers extended runtime for full-length events. As part of the broader ew 100 G4 system, the SK 100 G4-A can be expanded alongside other transmitters and receivers to build multi-channel wireless setups for more complex productions.

Key Features

Body pack transmitter with 1/8" audio input socket (ew connector), frequency range: A (516 - 558 MHz)

The Package heigt of the product is 3.19 inches

The Package Length of the product is 13.78 inches

The Package Width of the product is 2.87 inches

Specifications

Frequency Range
A band (516–558 MHz)
Audio Input
1/8" (3.5mm) locking ew connector
Construction
Metal housing
Power Source
2 x AA batteries
Compatible Receivers
Sennheiser ew 100 G4 series
Model Number
509501

Frequently Asked Questions

The SK 100 G4 uses Sennheiser's 1/8-inch (3.5mm) locking ew connector, which is compatible with Sennheiser ME-series lavalier and headset microphones as well as third-party mics with the ew connector.
The SK 100 G4-A is designed to work with Sennheiser ew 100 G4 series receivers, including the EK 100 G4 portable receiver and EM 100 G4 rackmount receiver, within the matching A frequency band.
This unit operates in the A band (516–558 MHz). You need to ensure this frequency range is legal and available for use in your country or region, and that your receiver matches the same frequency band.
The SK 100 G4 runs on two AA batteries (not AAA) and provides up to 8 hours of operation, depending on the transmission power setting and battery type.
Yes. With a compatible Sennheiser CI 1 instrument cable (sold separately), the SK 100 G4 can transmit audio from guitars, basses, and other instruments with a 1/4-inch output.

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