Sennheiser EW-DX SK Bodypack transmitter with 3,5 mm jack

Product Overview

The Sennheiser EW-DX SK is a standalone digital bodypack transmitter for the EW-DX wireless platform, featuring a 3.5mm locking jack input for use with lavalier microphones, headset microphones, and instrument cables. Sold as a standalone unit, it gives system integrators and professional AV installers the flexibility to pair the EW-DX platform with their choice of compatible 3.5mm-terminated microphone or instrument. Sennheiser's proprietary SePAC codec delivers 134 dB of input dynamic range — eliminating the need for transmitter gain adjustments across all source types, from whisper-level lavalier signals to instrument-level inputs. With in-device charging contacts, an E-Ink persistent display, and a programmable mute switch, the EW-DX SK is engineered for demanding professional environments including theater, broadcast, corporate AV, and live performance.

Product Description

The EW-DX SK bodypack transmitter with 3.5mm locking jack is the standard bodypack component of Sennheiser's EW-DX digital wireless system. It accepts any microphone or instrument with a standard 3.5mm locking TRS jack — the same connector used across Sennheiser's extensive range of lavalier and headset microphones, including the MKE 1, ME 4, ME 2-II, HSP 2, and many others.

The transmitter's 134 dB input dynamic range, enabled by the SePAC codec, is one of its defining advantages. It handles mic-level signals from miniature lavaliers, instrument-level signals from guitars and basses (with cable emulation to preserve cable characteristics), and even line-level signals — all without requiring any input gain adjustment. This dramatically simplifies system setup in fast-paced live and broadcast environments. The digital audio trim and switchable low-cut filter (Off, 30, 60, 80, 100, 120 Hz) give audio engineers additional refinement tools when needed.

The programmable mute switch on the EW-DX SK can be configured as AF mute, RF mute, or completely disabled from the transmitter's function buttons or remotely via Sennheiser Control Cockpit software. In-device charging contacts support use with the CHG 70N network charging dock for in-transmitter battery charging, and the persistent E-Ink display retains transmitter parameters even when powered off. The EW-DX platform's equidistant tuning grid and wide switching bandwidth of up to 88 MHz enable large-scale, dense channel deployments — up to 146 channels per band — making it ideal for complex multi-wireless installations managed via Sennheiser's Wireless Systems Manager (WSM) or Control Cockpit.

Key Features

• 3.5mm Locking Jack Input — Compatible with a wide range of Sennheiser lavalier and headset microphones using the standard 3.5mm locking TRS connection.
• 134 dB Input Dynamic Range (SePAC) — Handles mic, instrument, and line-level inputs with zero transmitter gain adjustment required.
• Programmable Mute Switch — Configurable as RF Mute, AF Mute, or disabled; lockable and remotely overridable from the receiver.
• Instrument Input with Cable Emulation — Simulates cable characteristics for accurate reproduction of guitar and bass signals.
• 10 mW Fixed RF Power / 100 m Range — Reliable UHF transmission up to 328 ft under line-of-sight conditions.
• Persistent E-Ink Display — System parameters visible even when the bodypack is powered off, ideal for multi-unit deployments.
• In-Device Charging Contacts — Compatible with CHG 70N dock for in-transmitter charging without battery removal.
• Up to 12 Hours Battery Life — With optional BA 70 Li-ion rechargeable battery; standard AA batteries also supported.
• Switchable Low Cut (Off / 30–120 Hz) — Multiple high-pass filter settings for different source and noise floor requirements.
• Digital Audio Trim & Mic Input Trim — On-board level control for precise signal optimization without external gear.
• Metal Housing — Rugged construction suited for daily professional performance and installation use.
• Network-Ready EW-DX Platform — Full integration with Control Cockpit, Wireless Systems Manager, and Smart Assist App for remote management.

Typical Applications

• Theater and performing arts productions with lavalier or headset microphones
• Broadcast and television studio talent microphone channels
• Houses of worship with bodyworn presenter and vocalist microphones
• Corporate AV installations with managed multi-channel wireless systems
• Live music and touring with instrument or headset connections
• Conference centers and convention halls requiring scalable wireless infrastructure
• System integrators specifying EW-DX bodypack channels with custom microphone selection

Technical Specifications

Frequently Asked Questions

Q: Does the EW-DX SK (3.5mm) come with a microphone?

No. The EW-DX SK bodypack is sold as a standalone transmitter without a microphone. It is compatible with any Sennheiser lavalier or headset microphone that uses a 3.5mm locking jack connector, such as the MKE 1, ME 4-II, ME 2-II, and HSP 2. Contact Creation Networks to order a compatible microphone alongside this transmitter.

Q: What is the difference between the EW-DX SK (3.5mm) and the EW-DX SK 3-PIN?

The EW-DX SK uses a standard 3.5mm locking jack input, which is compatible with most Sennheiser consumer and pro lavalier and headset microphones. The EW-DX SK 3-PIN uses a 3-pin LEMO connector, which is required for professional miniature condenser microphones like the MKE 1-EW3. Choose the 3-PIN version when your microphone requires a LEMO connection.

Q: Can I use the EW-DX SK bodypack with a guitar or bass?

Yes. The EW-DX SK includes an instrument input mode with cable emulation to simulate the electrical characteristics of a standard guitar cable. This preserves the natural tone of the instrument as if it were plugged directly into a cable.

Q: Which receiver is compatible with the EW-DX SK?

The EW-DX SK is designed for EW-DX receivers (EM 2 or EM 4 series). It is also backward-compatible with EW-D receivers, though advanced features like Link Density mode and the full 88 MHz switching bandwidth require an EW-DX receiver.

Q: Can I charge the EW-DX SK without removing the battery?

Yes. The transmitter has in-device charging contacts for use with the Sennheiser CHG 70N network charging dock (sold separately). The optional BA 70 lithium-ion battery supports in-transmitter charging for streamlined multi-unit workflows.

Q: How do I configure the mute switch behavior?

The mute switch on the EW-DX SK can be set to AF Mute (audio muted, RF still transmitting), RF Mute (RF signal cut entirely), or disabled — from the transmitter's function buttons or remotely via Sennheiser's Control Cockpit or Smart Assist app.

Q: How many EW-DX SK bodypacks can I run at the same time?

The EW-DX platform supports up to 146 simultaneous channels per band in equidistant tuning grid mode, and up to 292 in Link Density mode, depending on receiver model and local RF conditions.

Q: Is the EW-DX SK compatible with Sennheiser's network management tools?

Yes. The EW-DX SK integrates with Sennheiser's Control Cockpit and Wireless Systems Manager for full remote monitoring and control over a network. The Smart Assist app provides Bluetooth-based setup and parameter adjustment from a mobile device.