Sennheiser EW-DX simplifies your professional workflow by utilizing refined technologies 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 performance productions benefit from a network-ready system that is designed to integrate seamlessly. AutoScan 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.
Features
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Two-channel digital half rack (9.5") in rugged metal housing
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Up to 88 MHz switching bandwidth
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Low latency of 1.9 ms wireless transmission thanks to proprietary Sennheiser Performance Audio Codec (SePAC)
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134 dB input dynamic range - no need to set gain on your wireless transmitters at all, thanks to proprietary Sennheiser Performance Audio Codec (SePAC)
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Equidistant channel spacing to easily allocate intermodulation-free channels: Standard Mode with 600 kHz spacing for up to 146 channels; Link Density (LD) Mode with 300 kHz spacing for up to 293 channels
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Network enabled for expanded remote control with Sennheiser Control Cockpit, Wireless System Manager and 3rd party media control systems via plug-in
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Power over Ethernet (PoE IEEE 802.3af Class 3)
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Ethernet connectivity (IPv4 and IPv6)
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Secure transmission of confidential content using AES 256 encryption
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AutoScan-feature quickly scans your environment and deploys frequencies with equidistant channel spacing - even without RF knowledge
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Link Quality Indicator (LQI) showing the quality of the links separate to the RF levels
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Remote control via Smart Assist App over Bluetooth® Low Energy (BLE) at distances up to 25 meters
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Clear and easy focused user interface with OLED display, jog wheel navigation and control buttons
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Selective headphone output with volume control on front panel
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Extended menu settings such as custom frequency list, selectable sync parameter and walk test
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External PSU 12V/1A
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Worldwide usage (specific frequencies subject to local RF regulations)
Top Specs
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Specification
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Value
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Dimensions
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212 x 44 x 189 mm
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Weight
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Approx. 1000 g (without antennas and power supply)
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Audio Output
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2 × 70 mW @ 32 Ω
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Latency
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1.9 ms
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Power Consumption
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Max. 12 W
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Connection
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Wireless
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Tech Specs
Product
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Specification
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Value
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Total harmonic distortion (THD)
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≤ -60 dB for 1 kHz @ -3 dBfs input level
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Latency
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1.9 ms
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Frequency Specifications
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Specification
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Value
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Audio frequency response
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20 Hz – 20 kHz (-3 dB) @ 3 dBfs
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Acoustic Properties
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Specification
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Value
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Dynamic range
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> 134 dB
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Audio output level
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18 dBu max.
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Connectivity
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Specification
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Value
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Connection
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Wireless
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Inputs/Outputs
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Specification
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Value
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Audio output
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2 × 70 mW @ 32 Ω
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Ambient Conditions
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Specification
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Value
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Operating relative humidity
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5 – 95 % (non-condensing)
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Operating temperature
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-10 °C – +50 °C (14 °F – 122 °F)
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Battery & Power
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Specification
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Value
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Battery included
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No
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Power consumption
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Max. 12 W
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Charging current
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≤ 1 A
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Electrical Properties
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Specification
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Value
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Input voltage
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11 – 13 V ⎓ or PoE IEEE 802.3af Class 0 (CAT5e or higher)
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Transmission power
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BLE: max. 10 mW EIRP
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Dimensions
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Specification
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Value
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Dimensions
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212 x 44 x 189 mm
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Height
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73 mm
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Width
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350 mm
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Length
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405 mm
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Weight
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Approx. 1000 g (without antennas and power supply)
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Bluetooth
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Specification
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Value
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Bluetooth transmission frequency
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2402 – 2480 MHz
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What's in the box
EW-DX EM 2 (R1-9) – Premium Digital Receiver for Professional Audio Systems
EW-DX EM 2 (R1-9) is a 2-channel Rackmount Receiver from the Sennheiser EW‑DX series, operating in the R1‑9 frequency band (520 – 607.8 MHz) with a wide 88 MHz bandwidth. Featuring support for up to 293 simultaneous channels, ultra-low latency of just 1.9 ms, and AES‑256 encryption, it’s the ideal solution for professional digital wireless microphone systems in high-end conferences and live stage applications.
EW Digital Sound Quality – Designed for Every Professional Requirement
EW-DX EM 2 (R1-9) delivers exceptional audio performance with a wide frequency response of 20 Hz – 20 kHz, an impressive 134 dB dynamic range, and extremely low total harmonic distortion (THD ≤ -60 dB). SePAC codec technology reduces latency to just 1.9 ms, making it perfect for applications like premium conference microphones and professional stage performances.
Powerful Connectivity and Superior RF Interference Protection
The receiver performs reliably in complex RF environments thanks to its R1‑9 (520 – 607.8 MHz) frequency band and dual operating modes:
- Standard (600 kHz) supporting up to 146 channels
- Link Density (300 kHz) expanding capacity to 293 channels
AutoScan and Equidistant spacing features automatically detect and optimize clean frequencies, minimizing RF interference – a key advantage of UHF wireless microphones.
Modern Management Integration and Optimized Design
EW‑DX EM 2 (R1‑9) supports Ethernet IPv4/IPv6 with PoE (IEEE 802.3af), allowing remote control via Sennheiser Control Cockpit, “Wireless Systems Manager,” or the Smart Assist app (Bluetooth LE, 25 m range). Its OLED display and jog-wheel ensure user-friendly navigation. Compact half-rack 9.5″ design (212 × 44 × 189 mm, 1.0 kg) with a robust metal housing makes it easy to integrate into standard racks – perfect for any stage and conference audio system.
Buy EW-DX EM 2 (R1-9) at Hoang Bao Khoa – Genuine Products, Fast Delivery, and Comprehensive Warranty
Hoang Bao Khoa is an official distributor of Sennheiser in Vietnam, ensuring customers receive authentic products with superior after-sales support:
- 100% genuine Sennheiser products with full CO, CQ, and VAT invoices.
- Stock available for nationwide fast delivery.
- 1:1 replacement within 48 hours for manufacturer defects.
- 24-month official warranty for peace of mind.
- Experienced consultants providing setup assistance and optimization for professional audio systems.
Conclusion
EW‑DX EM 2 (R1‑9) is the perfect solution for Sennheiser wireless microphone systems, offering outstanding sound quality, robust scalability, and advanced management features. It’s a smart investment for professional audio projects in stage, conference, and large-scale event environments.