Sennheiser EW-D CI1 SET (R4-9) Digital Wireless Instrument System

Sennheiser EW-D CI1 SET (R4-9) – Description

The EW-D CI1 SET (R4-9) is a digital wireless instrument system designed for guitars, basses, keyboards, and other line-level instruments. It includes a bodypack transmitter, a CI1 instrument cable, and a rack/tabletop receiver. The system delivers high-quality audio, low latency, and reliable wireless performance, making it suitable for live performances, rehearsals, and studio use.

Key Features

Wireless Technology

• Digital UHF transmission with true-diversity reception

• Frequency band R4-9: 470.2 – 526 MHz

• Wide tuning bandwidth with multiple selectable frequencies

• Supports multiple transmitters for larger setups

Audio Performance

• Frequency response: 20 Hz – 20 kHz

• High dynamic range for clear, detailed sound

• Low latency (~1.9 ms) for real-time performance

Receiver

• Rack-mountable or tabletop (half-rack) design

• Balanced XLR and unbalanced 1/4" outputs

• LED indicators for signal and system status

Bodypack Transmitter

• Durable, compact metal housing

• 3.5 mm input for CI1 instrument cable

• Transmission power around 10 mW ERP

• Powered by 2× AA batteries (~8 hours runtime) or optional rechargeable batteries

Convenience

• Automatic frequency scanning and easy setup

• Reliable performance with freedom of movement for performers