Sennheiser EW-D CI1 R4-9

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Sennheiser EW-D CI1 R4-9

Sennheiser

EW-D CI1 R4-9

5 Expert Rating

Product Info

Article Number: 519163
Model: EW-D CI1 R4-9
Price: $610.50

* Prices may vary. Check retailer for current pricing and availability.

The Sennheiser ew-D CI1 R4-9 is a serious step up for gigging bassists and guitarists who demand reliable wireless. The digital transmission is exceptionally clean, and the clip-on cable ensures your instrument’s tone isn’t compromised – it's a great option for players needing freedom without sacrificing quality.

Product Description

  • Sennheiser ew-D CI1 R4-9
  • Digital Wireless System
  • With CI1 instrument cable
  • Frequency range R4-9: 552 - 608 MHz
  • Switching bandwidth: 56 MHz
  • Dynamic range: 134 dB
  • Frequency range: 20 - 20
  • 000 Hz
  • Transmission power: 10 mW
  • 4-Digit battery indicator on receiver
  • Mobile access via Smart Assist App for system settings
  • Operating time with AA batteries: up to 8 hours
  • 2 BNC antenna jacks
  • Outputs: XLR
  • jack (balanced/unbalanced)
  • Includes 2x antennas
  • power supply unit with country adapter
  • rackmount set and AA batteries
PROS
  • • Rock-solid 2.4 GHz digital transmission eliminates RF interference
  • • CI1 clip-on cable delivers transparent, high-fidelity instrument tone
  • • Smart Assist App offers intuitive control and real-time monitoring
  • • Receiver’s compact design and included rackmount kit enhance portability and setup
CONS
  • • Limited frequency band (R4-9) may require coordination in crowded RF environments
  • • AA battery power can be less convenient than rechargeable options
  • • Premium-priced, representing a significant investment for gigging musicians

Product Video

Key Features

Frequency Band 552 - 608 MHz (R4-9)
Channels Up to 12
Range Approximately 300 ft, line of sight
Latency Less than 3 ms
Battery Life Up to 8 hours (AA)
Connector XLR, Jack (balanced/unbalanced)

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Frequently Asked Questions

The digital transmission is far more robust, offering immunity to interference and a more stable signal compared to the noise and dropouts common with analog systems.
No, the system functions perfectly well without the app, but it provides valuable tools for channel scanning, battery status monitoring, and advanced settings adjustments.
The CI1 is designed specifically for instrument cables, and while Sennheiser might offer alternative options, compatibility isn't guaranteed and could impact performance.

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