Sennheiser EW-D CI1 Set (S1-7) Receiver + Bodypack Transmitter

The Sennheiser EW-D CI1 Set (S1-7) is a digital wireless instrument system designed for guitarists, bassists, and instrumentalists who need a clean, low-latency wireless connection.
Operating in the 606.2–662 MHz band, it delivers 24-bit digital audio, excellent dynamic range, and reliable UHF performance.
This set includes the EW-D receiver, EW-D bodypack transmitter, and the CI1 instrument cable.

Included Components

• EW-D digital receiver (S1-7 band)

• EW-D bodypack transmitter (S1-7 band)

• CI1 6.3 mm jack instrument cable

• 2 × antennas

• NT power supply

• Rackmount accessories

• Documentation

Key Features

• Operating frequency range: 606.2–662 MHz

• 24-bit digital audio quality with wide dynamic range

• Very low latency (approximately 1.9 ms)

• Automatic frequency coordination using the Smart Assist app

• Up to 90 channels depending on environment

• 56 MHz wide switching bandwidth

• Digital UHF transmission with no companding

• Rugged metal bodypack transmitter

• OLED displays on both transmitter and receiver

• AES 256-bit encryption for secure transmission

• CI1 instrument cable provides clean signal path for electric guitars, basses, keyboards, and instruments with active or passive pickups

Technical Specifications

EW-D Receiver:

• Outputs: balanced XLR + unbalanced 6.3 mm jack

• Frequency response: 20 Hz – 20 kHz

EW-D Bodypack Transmitter:

• Connector: 3-pin locking mini-jack for CI1 cable

• RF output: up to 10 mW

• Power: BA 70 rechargeable battery or 2 × AA batteries

• Runtime: up to 8 hours (with BA 70)