Sennheiser EW-D SK Base Set (R4-9) – UHF digital wireless kit with bodypack transmitter and rackmount receiver
Sennheiser represents German excellence in professional audio. Renowned for its reliable wireless technologies and outstanding sound quality, the brand has equipped stages, broadcast studios, and production environments worldwide for decades. The Evolution Wireless Digital series continues this legacy by combining digital precision, rugged construction, and effortless operation.
The EW-D SK Base Set (R4-9) is a complete base package featuring an EW-D EM rack receiver and an EW-D SK bodypack transmitter, compatible with a wide range of Evolution Wireless Digital microphones. It stands out with its UHF digital transmission that eliminates noise and interference, and intuitive control via the Smart Assist App over Bluetooth. Ideal for musicians, presenters, and sound engineers, it ensures stable performance and great freedom of movement.
With its 24-bit digital architecture and an impressive 134 dB dynamic range, the EW-D SK Base Set delivers clean, natural, and distortion-free audio, even during the most dynamic performances. The system supports up to 90 simultaneous channels thanks to its 56 MHz bandwidth and intermodulation-free design, providing simple and reliable frequency coordination. The optional BA 70 lithium-ion battery pack offers up to 12 hours of operation, while standard AA batteries provide up to 8 hours of continuous use.
Versatile, scalable, and built to last, this system integrates seamlessly with other components from the Evolution Wireless range. It’s ideal for professional setups requiring flexibility, extended range, and flawless audio quality. Rackmountable and enclosed in a rugged metal chassis, the EW-D SK Base Set combines German reliability with modern ergonomic design.
Specifications:
- Type: UHF digital wireless system with bodypack transmitter and rackmount receiver
- Transmission: 24-bit digital in the UHF band for enhanced range and reliability
- Frequency range: R4-9 (552 - 607.8 MHz)
- Control: Bluetooth operation via Smart Assist App for easy setup and monitoring
- Dynamic range: 134 dB – no sensitivity adjustment required
- Bandwidth: 56 MHz – up to 90 available channels
- Selectable frequencies: 2,240
- Latency: ultra-low 1.9 ms
- Battery life: up to 12 h (BA 70 Li-ion pack) or 8 h (2x AA batteries)
- Connectivity: Bluetooth Low Energy (BLE) for remote control
- Dimensions: receiver 212 x 44 x 189 mm / transmitter 63 x 80 x 20 mm
- Weight: receiver approx. 1,000 g / transmitter approx. 120 g
- Audio frequency response: 20 Hz – 20 kHz (-3 dB)
- RF output power: 10 mW ERP (audio link), 12 mW ERP (Y1-3 range)
- Operating temperature: -10 °C to +55 °C
- Package includes: EW-D EM receiver, EW-D SK bodypack transmitter, 2 antennas, power supply, rack kit, rubber feet, quick guide
Key Points:
- UHF digital transmission eliminates noise and interference
- Smart Assist App for full Bluetooth control and monitoring
- 134 dB dynamic range ensures crystal-clear, distortion-free sound
- Up to 12-hour battery life with BA 70 lithium-ion pack
- Rackmount design and rugged metal construction for touring reliability
