Sennheiser EW-D SK Digital Wireless Bodypack Transmitter

Product Overview

The Sennheiser EW-D SK is the bodypack transmitter of the EW-D digital wireless platform, sold as a standalone unit for integrators expanding existing EW-D systems or building custom multi-channel lavalier, headset, and instrument rigs. Its locking 3.5mm TRS connector accepts compatible lavalier microphones, headset mics, and instrument adapter cables, giving system designers flexibility across presentation, performance, and broadcast applications. With 24-bit digital audio and a 134 dB dynamic range, it delivers clean, professional-grade signal regardless of source — voice, acoustic instrument, or line-level feed. This standalone configuration is the correct purchase for multi-channel deployments where the receiver is already on hand.

Product Description

The EW-D SK bodypack transmitter connects to the EW-D EM receiver and compatible EW-D platform receivers to provide pristine 24-bit digital wireless audio. Its 134 dB dynamic range handles everything from quiet spoken-word presenters to loud acoustic instruments without requiring any gain adjustment at the transmitter — a significant operational advantage in multi-presenter or quick-changeover environments. The locking 3.5mm TRS input ensures the connected microphone or cable stays firmly seated even during active movement on stage.

A front-panel mute switch is standard, and like all EW-D transmitters, the mute function can be remotely locked or overridden from the EW-D EM receiver or via the Sennheiser Smart Assist app over Bluetooth — giving operators precise control in moderated panel discussions, corporate events, and broadcast productions. The bodypack pairs instantly with the receiver at the press of a button over Bluetooth at distances up to 120 feet.

The EW-D SK shares the same RF architecture as all EW-D components: 2,240 equidistantly spaced frequencies across a 56 MHz bandwidth. This intermodulation-free tuning grid is essential in dense multi-channel environments — convention centers, performing arts venues, and houses of worship running eight or more simultaneous wireless channels. RF coordination and monitoring are handled via the Smart Assist app on iOS or Android devices, or directly from the EW-D EM receiver's front panel.

Battery runtime is up to 8 hours on two AA batteries, or up to 12 hours with the optional Sennheiser BA 70 lithium-ion rechargeable pack (sold separately; requires L70 USB dual-charging station). The EW-D SK is available in three frequency bands to suit regional spectrum licensing and existing RF environments. Note: the EW-D SK is not backward-compatible with previous Sennheiser evolution analog wireless systems.

Key Features

• Standalone Bodypack SKU — Sold individually; ideal for expanding existing EW-D systems or building custom multi-channel rigs without bundled accessories.
• 24-Bit Digital Audio — 134 dB dynamic range; no compander noise, coloration, or analog artifacts.
• Locking 3.5mm TRS Input — Accepts compatible lavalier microphones, headset mics, and instrument adapter cables with a secure connection.
• EW-D Platform Compatible — Pairs with EW-D EM single-channel and compatible multi-channel EW-D receivers.
• 2,240 Equidistant Frequencies — 56 MHz bandwidth with intermodulation-free grid; engineered for dense multi-channel RF environments.
• Mute Switch with Remote Lock/Override — Operator-controllable from receiver or Smart Assist app; prevents accidental unmute during live events.
• Bluetooth Pairing & Remote Control — Instant receiver sync and full parameter management from Smart Assist app up to 120 ft away.
• Handles Multiple Source Types — Voice (lav/headset), acoustic instruments, and line-level sources without gain adjustment.
• Flexible Battery Options — Up to 8 hours on 2x AA or 12 hours with optional BA 70 rechargeable pack (sold separately).
• Three Frequency Band Options — Q1-6 (470.2–526 MHz), R1-6 (520–576 MHz), R4-9 (552–607.8 MHz).
• All-Metal Housing — Rugged, tour-grade build for rental, touring, and permanent installation environments.

Typical Applications

• Houses of worship — lavalier channels for pastors and choir leaders in multi-channel EW-D systems
• Corporate AV — presenter bodypack channels for town halls, panel discussions, and conference rooms
• Performing arts — headset mic channels for musical theater, dance, and theatrical productions
• Broadcast and livestream — talent bodypack with operator mute control via Smart Assist app
• Education — lecture hall lavalier systems with remote RF management
• Acoustic instrument reinforcement — guitar, violin, and wind instrument applications via adapter cable

Technical Specifications

Frequently Asked Questions

Q: What microphones are compatible with the EW-D SK bodypack?

The EW-D SK accepts any microphone or instrument cable with a compatible 3.5mm locking TRS connector, including Sennheiser lavalier and headset microphones designed for the EW-D platform. Adapter cables are also available for instrument use. Contact Creation Networks for microphone compatibility guidance.

Q: Why would I purchase the SK bodypack separately rather than as part of a set?

Purchasing the SK bodypack standalone is the right approach when expanding an existing EW-D system with additional channels or when specifying microphones separately. It avoids paying for a bundled microphone you don't need and gives integrators full control over microphone selection.

Q: Can the EW-D SK be used with instruments like guitars?

Yes. The 3.5mm locking TRS input accommodates adapter cables for guitar, bass, and other instruments. The 134 dB dynamic range handles instrument-level signals without distortion or gain adjustment.

Q: Is the EW-D SK compatible with my existing Sennheiser evolution analog system?

No. The EW-D SK is a digital-only transmitter and requires an EW-D series receiver. It is not backward-compatible with Sennheiser evolution analog wireless systems (ew 100, ew 300, ew 500 series).

Q: How does the remote mute control work?

The mute switch on the EW-D SK can be locked out from the receiver or the Sennheiser Smart Assist app, preventing talent from unmuting at an inopportune time. Operators can also trigger and release mute remotely via the app, which is ideal for broadcast and moderated panel scenarios.

Q: How many EW-D SK transmitters can operate simultaneously?

The EW-D system supports up to 90 simultaneous channels using the equidistant frequency grid, making it suitable for large-scale multi-channel deployments in performing arts venues, convention centers, and houses of worship.

Q: Which frequency band should I choose?

Q1-6 (470.2–526 MHz), R1-6 (520–576 MHz), and R4-9 (552–607.8 MHz) are available. Your choice should be based on your region's licensed UHF spectrum and existing RF environment. Creation Networks can assist with site RF analysis and band selection.

Q: What charging solution is needed for the BA 70 rechargeable battery?

The optional Sennheiser BA 70 rechargeable battery pack requires the L70 USB dual-charging station, sold separately. The charging station is not included with the EW-D SK bodypack.