Features
- Digital transmission in the UHF band: no noise, no interference and no clicks – for uninterrupted,
- crystal-clear sound with optimal scalability
- Mobile access to all system settings simplifies setup and operation without cumbersome navigation
- Automatic setup for effortless, reliable connection in no time at all
- Up to 2240 selectable frequencies for operation of up to 24 wireless systems per frequency range
- Optional lithium-ion battery provides up to 12 hours of operation (up to 8 hours using standard AA batteries)
- 56 MHz switching bandwidth for up to 90 available channels
- Captures every detail with 134 dB dynamic range – even in the most powerful performances
Evolution Wireless Digital, the new standard
With the new EW-D system, Sennheiser opens up new possibilities where other systems have so far reached their limits. Where else can you get a connection in seconds and up to 90 fully scalable channels? And, of course, all this happens with virtually no latency!
The Evolution Wireless Digital System
The Sennheiser EW-D SK BASE SET R4-9 (552-607.8 MHz) consists of a stationary EW-D EM Rack Receiver and an EW-DSK digital bodypack transmitter for use with a wide range of Evolution Wireless Digital microphones. Sennheiser’s system uses the equidistant frequency grid, which has only been used until now in Sennheiser’s high-end Digital 6000 and Digital 9000 systems. This makes complex frequency coordination a thing of the past. This means that even laymen in radio technology can operate and set up the new system really quickly and easily. All settings are made via the display and the function keys.
Sound engineer in pocket format
Thanks to Bluetooth Low Energy, you have full control over the entire system – with the Sennheiser Smart Assist App. Take advantage of remote control and mobile access to every single system setting from the comfort of your Android or iOS device.
If you don’t want to spend a long time searching for free frequencies, you can activate the automatic setup and all parameters are automatically adjusted in the system. This works simultaneously with multiple radio links. So you save time and effort and can concentrate on your performance.
Battery or rechargeable battery – that is the question!
The new Sennheiser EW-D system can be operated with conventional AA batteries with a runtime of up to 6 hours. Optionally, there is the Sennheiser BA 70 rechargeable battery, which is much more ecological than batteries that are thrown away after a single use. In addition, the battery has a long runtime of up to 12 hours.
Frequency range
The Sennheiser EW-D SK BASE SET R4-9 operates in the frequency range 552-607.8 MHz and can therefore be used in the USA, Canada, EU, UK, Australia, Brazil, Russia, Singapore, Malaysia, Indonesia, Philippines, Vietnam, UAE, Qatar, Saudi Arabia.
Scope of delivery
All models of the Evolution Wireless Digital System are supplied with a rack kit which allows easy installation in a 19″ rack. Furthermore, a power supply unit with country-specific adapters is included in the scope of delivery.
The Sennheiser EW-D SK BASE SET R4-9 has the following scope of delivery:
- 1 x Stationary Receiver
- EW-D EM Rack Receiver
- 1 x EW-DSK digital bodypack transmitter
- 1 x NT 12-5 CW power supply unit
- Rack mount kit, rod antennas and rubber feet for EW-D EM
- 2 x batteries (AA)

KLOTZ SC-1 SPEAKER CABLE 1M SPEAKON-JACK
DADDARIO ACCESSORIES 50E03 WOVEN GUITAR STRAP SAUGERTIES
STAGG US-WHITE SOPRANO UKULELE
YAMAHA REVSTAR ELEMENT LEFTY ELECTRIC GUITAR BLK
TAYLOR 110E
STAGG HIGHGLOSS BLACK PIANO BENCH WITH SPARE CASE AND VELVET TOP
ROCKBOARD CABLE TIES 10 PCS SMALL BLACK
DUNLOP 243SI MEDIUM SIZE MOONSHINE CERAMIC SLIDE
YAMAHA POWDER PAPER
YAMAHA JR2 TOBACCO BROWN SB
KLOTZ TM.STEVENS FUNKMASTER ANGLED 4,5M
VOX MINI G3 ADAPTER
FENDER WILD ZEBRA PRINT STRAP
MEINL BYZANCE BRILLIANT MEDIUM RIDE 20-INCH
DADDARIO NYXL BASS 45-105
K&M 115/2 SHEET HOLDER BLACK
MEINL MDJBM DJEMBE BAG MEDIUM
SHURE SM63L OMNIDIRECTIONAL DYNAMIC REPORTER MICROPHONE
YAMAHA TRBX 174EW TBL
MEINL NINOADJ3S WOOD DJEMBE
TAYLOR 214CE KOA DELUXE
GEWA 5-STRING TENNESSEE TENOR BANJO ECONOMY WITH CASE
YAMAHA JR-2 NATURAL
ERNIE BALL VP JUNIOR POT 250K MONO
BEYERDYNAMIC DT-770 PRO 80 OHMS
SHURE SM7B DYNAMIC STUDIO VOCAL MICROPHONE
YAMAHA TRBX-204II ELECTRIC BASS GALAXY BLACK
KLOTZ KIK 1,5M INSTRUMENT CABLE BLACK
ORANGE CRUSH 20 GUITAR COMBO
DADDARIO ACCESSORIES 10FT SPEAKER CABLE PWS10
STAGG 925BK FEMALE XLR
STAGG US VIOLET SOPRANO UKE
DADDARIO ACCESSORIES 50A05 WOVEN GUITAR STRAP TIKI
SENNHEISER HD-25 REPLACEMENT EARPADS PAIR
PRESONUS QUANTUM 2
KORG KA350VI POWER SUPPLY
MEINL PADJ2MF AFRICAN DJEMBE
TAYLOR K24CE KOA
YAMAHA TRBX305 RED
WARWICK ROCKBOARD V10 MULTI POWER BLOCK ISO 10 V2
MEINL MB20 16MEDIUM HEAVY CRASH
STUDIO49 AGc ALTO GLOCKENSPIEL
DADDARIO ACCESSORIES 50B01 WOVEN GUITAR STRAP BLACK SATIN
YAMAHA TRBX304 BLACK
K&M 234 TABLE MIC.STAND Black
ERNIE BALL MIGHTY SLINKY NICKEL WOUND ELECTRIC GUITAR STRINGS 8.5 - 40 GAUGE
JBL SRX812P 12" TWO-WAY BASS REFLEX SELF-POWERED SYSTEM
VINCENT BACH Bb TRUMPET LR180-43 STRADIVARIUS
YAMAHA TRBX-204 BRIGHT RED METALLIC
ERNIE BALL 5-STRING REGULAR BASS 45-130
AKG PERCEPTION WIRELESS PRESENTER SET CK99L BAND ISM
YAMAHA YTR 9335NYS CUSTOM NEW YORK Bb TRUMPET SILVER PLATED
ERNIE BALL P01422 80/20 BRONZE .022, SINGLE ACOUSTIC GUITAR STRING
TAKAMINE GD71CE-BSB
DADDARIO ACCESSORIES PWCT16 NS MICRO BANJO TUNER
YAMAHA EMX5
TAKAMINE GJ72CE NAT
TAKAMINE GD30-BLK
YAMAHA TRBX305 WHITE
DADDARIO ECG25 CHROMES
SHURE SM63LB OMNIDIRECTIONAL DYNAMIC REPORTER MICROPHONE BLACK
FENDER TRE-VERB DIGITAL REVERB/TREMOLO
AKG WMS470 PRESENTER WIRELESS SET
DADDARIO ACCESSORIES SPEAKER CABLE 1,5M SPEAKON PWSO05
LINE6 RELAY G75
TAMA TW100 TENSION WATCH
SENNHEISER HD25
SENNHEISER EW D1 ME2 LAVALIER SET
BOSS ES5 EFFECTS SWITCHING SYSTEM
BOSS PCS-20A DAISY CHAIN CABLE FOR PEDALS
DADDARIO ACCESSORIES 50A07 WOVEN GUITAR STRAP CELTIC
EVANS EC2 COATED 13 INCH
DADDARIO ACCESSORIES AUTO-TRIM 3+3 PWAT333L
STAGG US80-SE EL/AC SOPRANO UKULELE
EPIPHONE LES PAUL CUSTOM EBONY
YAMAHA APX 700II VS
IBANEZ UV70P-BK STEVE VAI 7-STRING
YAMAHA TRBX505 TRANSLUCENT BROWN
STAGG HGB2UKC CONCERT UKULELE SOFTCASE
SHURE BLX24E/PG58 VOCAL SET 