Sennheiser EW-DX SKM-S Wireless Handheld Transmitter

Get clear, reliable onstage wireless. The EW-DX SKM-S handheld transmitter gives you 12 hours of battery life with an always-on display for vital parameters.

Digital wireless handheld transmitter with switch compatible with Evolution Wireless Digital systems. Rugged metal housing with standard capsule interface for a wide range of Sennheiser and Neumann microphone modules. Up to 12 hours of runtime, persistent E-Ink display and charging contacts for in-device charging.

Sennheiser EW-DX simplifies your professional workflow by utilizing refined technologies and decades of research to deliver a digital UHF system that can be scaled with ease. With its advanced feature set and hardware options, classrooms, corporate campuses, and live productions benefit from a network-ready system that is designed to integrate seamlessly. The system quickly assesses your environment and uses equidistant channel spacing to deploy frequencies while tools like Sennheiser's Control Cockpit, Wireless Systems Manager, and Smart Assist App allow you to monitor your system remotely. In-device charging, 12-hour battery operation, and switching bandwidth up to 88 MHz are only a few more of the many features that make EW-DX the right tool for the job.


- 134 dB input dynamic range - no need to set gain on your wireless transmitters at all, thanks to proprA5:B26
- 10mW fixed RF power for up to 100 m/328 ft of range
- Charging contacts for in-device charging with CHG 70N charger (sold separately)
- Persistent E-Ink display for "always on" information - parameters visible on screen even when taking out batteries
- Up to 12 hours of operation time read more with rechargeable lithium ion battery BA 70 (sold separately)
- Programmable mute switch (AF Mute, RF Mute, no function)
- Function buttons - control all the transmitter settings directly from the handheld including button lock function
- Digital audio trim
- Test tone generator
- Switchable LED configuration (On/Off)
- Switchable low cut (Off, 30 ,60, 80, 100, 120 Hz)
- Versatile charging options optionally available: CHG 70 N, L 70 USB, LM 6070 Module for L 6000 full rack charging station (Availability in 2023)
- Sennheiser Standard Capsule Interface - compatible with a wide range of Sennheiser and Neumann capsules (sold separately)
- Metal housing
- Worldwide usage (specific frequencies subject to local RF regulations)
- Note: All components of the Evolution Wireless Digital Family are designed to interoperate. Please be aware of restrictions of features linked to the respective series, such as switching bandwidth and use of Link Density mode.
- EW-DX SKM-S handheld transmitter
- MZQ 1 microphone clamp
- 2 Batteries (AA)
WARNING: Cancer and Reproductive Harm -
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- LD mode: 10 mw ERP
- BLE: max. 10 mW EIRP
- Q1-9: 470.2 - 550 MHz
- R1-9: 520 - 607.8 MHz
- S1-10: 606.2 - 693.8 MHz
- S2-10: 614.2 - 693.8 MHz
- S4-10: 630 - 693.8 MHz
- U1/5: 823.2 - 831.8 MHz & 863.2 - 864.8 MHz
- V3-4: 925.2 - 937.3 MHz
- V5-7: 941.700- 951.800 & 953.050 - 956.050 & 956.650-959.650 MHz
- Y1-3: 1785.2 - 1799.8 MHz
- Bluetooth Low Energy (BLE) frequency range: 2405 - 2480 MHz
- Audio frequency response: 20 Hz - 20 kHz (-3 dB) @ 3 dBfs
- Total harmonic distortion (THD): = -60 dB for 1 kHz @ -3 dBfs input level
- Dynamic Range: 134 dB
- System Latency: 1.9 ms
- RF technology: Intelligent Switching Diversity
- Operating temperature: -10 *C - +55 *C (14 *F - 131 *F)
- Operating relative humidity: 5 - 95 % (non-condensing)

- EW-DX SKM (Handheld Transmitter):
- Input voltage: 2.0 - 4.35 V
- Input Current: = 300 mA
- Power Supply: 2 AA batteries 1.5 V (alkaline manganese) or BA 70 rechargeable battery pack"
200 kHz
- Transmit Power (radiated):
- Audio link: 10 mW ERP
- (Range Y1-3): 12 mW ERP
- Dimensions: 50 x 268 mm (incl. MMD 835 microphone module) / 40 x 200 mm (without microphone module)"
- Weight w/o Batteries: approx. 304 g (incl. MMD 835 microphone module) / approx. 195 g (without microphone module)"
Dimensions and Weight in Packaging
Shipping Weight: 1 lbs
Shipping Dimensions: 14 x 3 x 3 in
Manufacturer Part Number (MPN): 509412
Shipping Weight: 0.85 lbs
Shipping Dimensions: 14 x 3 x 3 in
Manufacturer Part Number (MPN): 509413

Consumer Alert

Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC's wireless microphone website at

NOTE: None of the wireless systems we carry are capable of violating the FCC guidelines stated above. We are presenting this information as a matter of legally required disclosure.

For support or warranty questions, please contact the manufacturer:
Phone: 877-736-6434


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