The Sennheiser EW-DP EK (R4-9) is a dedicated portable digital wireless receiver designed to function as the receiving endpoint for Sennheiser's innovative EW-DP series of plug-on transmitters, forming a highly compact and mobile professional wireless system ideal for camera-mounted operation and field production. Operating within the R4-9 frequency band of 552 to 607 MHz, this receiver utilizes a fully digital signal path to deliver exceptional audio quality, capturing the pristine 24-bit/48 kHz audio transmitted by its companion plug-on units with robust immunity to interference and dropout. Its primary design purpose is to provide a professional-grade wireless audio link directly to DSLR, mirrorless, and cinema cameras, as well as portable audio recorders, in a form factor that is as mobile as the camera itself, making it a cornerstone for electronic news gathering (ENG), documentary filmmaking, and event videography.

This receiver distinguishes itself with its compact, rugged housing and versatile mounting options. It features a standard cold shoe mount on its base, allowing it to be securely attached directly to a camera's hot shoe or any cold shoe adapter on a camera cage, ensuring a stable and integrated setup. For additional flexibility, it also includes a sturdy belt clip, enabling audio operators to carry it separately. The unit is equipped with a high-contrast OLED display that provides clear, at-a-glance information on RF signal strength, audio levels, selected frequency, and battery status. Intuitive tactile buttons allow for easy menu navigation, frequency selection, and gain adjustment, putting critical controls at the user's fingertips without needing to connect to a computer or external controller.

Connectivity is tailored for professional and consumer video gear, featuring both a balanced 3-pin XLR output for feeding professional mixers or recorders and a 3.5mm TRS output for direct connection to camera audio inputs. This dual-output design ensures compatibility with virtually any production audio chain. The receiver is powered by two standard AA batteries, offering extended operation time, and supports true diversity reception with two internal antennas to ensure a stable wireless link even as the camera operator moves. By combining reliable digital wireless performance, a camera-friendly form factor, and straightforward operation, the Sennheiser EW-DP EK receiver transforms any compatible camera into a high-fidelity wireless audio capture station, providing creators with broadcast-quality sound in an exceptionally portable package.