The Sennheiser EW-DX SK / SKM-S Base Set (R1-9) is a complete professional digital wireless microphone system designed for applications demanding superior audio quality, robust RF performance, and operational flexibility. This bundle combines a rackmount receiver with a choice of either a bodypack transmitter (SK) or a handheld transmitter (SKM-S), operating in the R1-9 frequency range of 520 to 607 MHz. It represents the digital evolution of Sennheiser's renowned Evolution Wireless series, utilizing a proprietary digital transmission scheme to deliver pristine 24-bit/48 kHz audio with an exceptionally wide dynamic range and extremely low latency. This digital foundation provides inherent resistance to interference and dropouts, ensuring reliable performance in challenging RF environments common at live events, in broadcast facilities, and within installed AV systems.

The system is built around user-centric design and intelligent features. The EM 2 rackmount receiver included in the set offers two independent channels in a 1U form factor, featuring a clear color display for real-time monitoring of RF signal strength, audio levels, and battery status. It includes advanced tools like an integrated spectrum analyzer for frequency coordination and one-touch synchronization to quickly pair with transmitters. The handheld transmitter (SKM-S) is built on a durable metal body housing a premium condenser capsule, delivering vocal clarity and detail suitable for both speech and demanding musical performances. The bodypack transmitter (SK) is a compact and rugged unit ideal for use with headset, lavalier, or instrument microphones, offering flexible input gain control and a robust belt clip for secure wear.

This base set is engineered for seamless integration into modern workflows. The receiver provides multiple output options, including analog XLR and digital AES3, and certain variants may offer optional Dante network audio output. The transmitters are powered by readily available AA batteries or optional rechargeable solutions and feature clear status displays. With features like automatic frequency management, pilot tone squelch, and remote monitoring capability via Sennheiser's Wireless Systems Manager software, the EW-DX Base Set provides a comprehensive, reliable, and high-fidelity wireless solution. It is an ideal starting point for broadcast engineers, front-of-house audio professionals, and system integrators seeking to build or upgrade a critical wireless channel with the performance and reliability associated with the Sennheiser brand.