Sennheiser EW-D SK Digital Bodypack Transmitter
The Sennheiser EW-D SK is a compact digital bodypack transmitter that sends a lavalier, headset, or instrument signal to any Evolution Wireless Digital receiver.
Its 134 dB input dynamic range means you never set input sensitivity. Pairing, scanning, and settings run through the EW-D Smart Assist app over Bluetooth Low Energy, so you set up a system from a distance.
Frequency Bands
This page offers three US bands: Q1-6 (470.2 to 526 MHz), R1-6 (520 to 576 MHz), and R4-9 (552 to 607.8 MHz). Each covers 56 MHz with up to 90 channels and 2,240 selectable frequencies. Digital transmission has no intermodulation, so channels sit on an even 600 kHz grid.
Power
The SK runs up to 8 hours on the two AA batteries that come with it, or up to 12 hours on a BA 70 rechargeable pack, sold separately. The BA 70 charges in the L 70 USB charger or an LM 6070 module.
Features
- Digital UHF bodypack transmitter
- 134 dB input dynamic range, no sensitivity setting
- Smart Assist app over Bluetooth Low Energy
- Auto scan for clear frequencies
- Up to 90 channels in 56 MHz
- 2,240 selectable frequencies
- 1.9 ms latency
- Up to 12 hours on a BA 70, 8 hours on AA




