Sennheiser EW-DX SK 3-PIN Digital Wireless Bodypack Transmitter with 3-Pin LEMO Connector

Product Overview

The Sennheiser EW-DX SK 3-PIN is a professional-grade digital bodypack transmitter for the EW-DX platform, equipped with a 3-pin LEMO connector for compatibility with Sennheiser's premium miniature condenser microphone capsules such as the MKE 1-EW3. This standalone transmitter gives system integrators and professional users access to the full EW-DX digital UHF feature set — including 134 dB dynamic range via SePAC, in-device charging, persistent E-Ink display, and network-based remote management — while enabling connection to the highest-quality miniature condenser microphones available in Sennheiser's portfolio. At $499, the SK 3-PIN is the right choice for broadcast, theater, and high-end corporate installations where only the most demanding microphone capsules will do.

Product Description

The EW-DX SK 3-PIN bodypack transmitter is built for professionals who require LEMO-connector compatibility for miniature condenser microphones in the EW-DX wireless platform. The 3-pin LEMO connector is the professional standard for high-end body-worn microphone applications, providing a secure, low-noise connection to precision miniature capsules used in broadcast production, theatrical performance, and high-visibility corporate presentations.

Like all EW-DX transmitters, the SK 3-PIN is powered by Sennheiser's proprietary SePAC codec, delivering a 134 dB input dynamic range. This means the transmitter handles everything from the delicate, low-noise output of a miniature condenser lavalier to instrument-level signals with zero gain adjustment required — a significant workflow advantage in broadcast and multi-channel live production environments. The EW-DX platform's equidistant tuning grid spaces 3,200 frequencies evenly across an 80 MHz bandwidth, preventing intermodulation interference when multiple systems operate in confined spaces.

The SK 3-PIN's mute button is lockable and can be remotely overridden from the receiver or the Smart Assist mobile app via Bluetooth at distances up to 120 ft — an essential feature for broadcast talent management. The persistent E-Ink display provides always-on parameter visibility, even when the transmitter is powered off, making multi-unit inventory management efficient. The SK 3-PIN is backward-compatible with EW-D receivers and supports the EW-DX system's expansion to up to 134 channels in equidistant tuning mode, or up to 269 channels in Link Density mode — all manageable via Sennheiser's Control Cockpit or Wireless Systems Manager.

Key Features

• 3-Pin LEMO Connector — Industry-standard LEMO connection for premium Sennheiser miniature condenser microphones (e.g., MKE 1-EW3) that require this interface.
• 134 dB Input Dynamic Range (SePAC) — Handles miniature condenser, instrument, and line-level sources without transmitter gain adjustment.
• Programmable Mute Switch — Lockable mute button with remote override from receiver or Smart Assist app via Bluetooth at up to 120 ft.
• Equidistant Tuning Grid — 3,200 frequencies evenly spaced across 80 MHz bandwidth to prevent intermodulation in dense multi-channel deployments.
• Up to 134 Channels (269 in Link Density Mode) — Scalable for large-scale broadcast, theater, and corporate wireless installations.
• Persistent E-Ink Display — System parameters visible even when powered off for efficient multi-unit management and labeling.
• In-Device Charging — Compatible with CHG 70N network charging dock for in-transmitter charging; up to 12 hours with BA 70 Li-ion battery.
• AA Battery Compatibility — Also operates on 2x AA batteries (included) for up to 8 hours without a rechargeable pack.
• Backward-Compatible with EW-D Receivers — Integrates into existing EW-D infrastructure while unlocking advanced EW-DX features with EW-DX receivers.
• Metal Housing — Rugged, lightweight build suitable for nightly broadcast and live performance use.
• Bluetooth 5.1 LE Quick Pairing — Pairs with receiver instantly at the press of a button for fast system deployment.
• Remote Management Ready — Full integration with Sennheiser Control Cockpit, Wireless Systems Manager, and Smart Assist App.

Typical Applications

• Broadcast television production requiring LEMO-connected miniature condenser microphones
• Theater and performing arts with premium lavalier microphones (MKE 1-EW3, etc.)
• High-end corporate presentations and conference productions
• Houses of worship with demanding audio quality requirements and dense channel counts
• Film and documentary production requiring discreet, high-quality body-worn audio
• System integrators specifying LEMO-compatible EW-DX bodypack channels
• Large-scale live events with 100+ simultaneous wireless channels

Technical Specifications

Frequently Asked Questions

Q: Does the EW-DX SK 3-PIN come with a microphone?

No. This is a standalone bodypack transmitter. It is designed for use with Sennheiser LEMO-connector miniature microphones such as the MKE 1-EW3. Contact Creation Networks to order a compatible LEMO microphone alongside this transmitter.

Q: What is a 3-pin LEMO connector and why would I need it?

The 3-pin LEMO is a precision miniature circular connector used in professional broadcast and theater wireless systems. It provides a very secure, low-noise connection and is required by premium Sennheiser miniature condenser microphones like the MKE 1-EW3. If your microphone uses a LEMO connector, you need this bodypack rather than the standard 3.5mm SK version.

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

The connector type is the key difference. The SK 3-PIN uses a 3-pin LEMO connector for professional miniature condenser capsules. The standard EW-DX SK uses a 3.5mm locking jack connector, which works with most Sennheiser consumer and pro lavalier and headset microphones. Choose based on which connector your microphone requires.

Q: Which receivers is the EW-DX SK 3-PIN compatible with?

It is designed for EW-DX receivers and is also backward-compatible with EW-D receivers. Using an EW-DX receiver unlocks the full feature set including expanded switching bandwidth and Link Density mode.

Q: How does the mute switch work on the SK 3-PIN?

The mute button can be locked out to prevent accidental activation during a performance and can be remotely overridden from the receiver or via the Smart Assist app using Bluetooth at distances up to 120 ft — ideal for broadcast directors and theater audio engineers who need central mute control.

Q: How many channels can I run simultaneously with the EW-DX SK 3-PIN?

In equidistant tuning grid mode the system supports up to 134 channels per band. In Link Density mode this expands to up to 269 channels per band — making it one of the highest-density wireless platforms available for professional use.

Q: Can I charge the SK 3-PIN in a rack-mount charging station?

Yes. The SK 3-PIN supports in-device charging via the CHG 70N network charging dock and is also compatible with the L 6000 full rack charging station via the LM 6070 module (sold separately). Both options support in-transmitter charging with the BA 70 Li-ion battery without removing the battery from the bodypack.

Q: Is the EW-DX SK 3-PIN manageable remotely?

Yes. The SK 3-PIN integrates fully with Sennheiser's Control Cockpit and Wireless Systems Manager for network-based remote monitoring and control. The Smart Assist app enables Bluetooth pairing and parameter adjustment from Android or iOS devices.