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
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EW-D digital receiver (S1-7 band)
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EW-D bodypack transmitter (S1-7 band)
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CI1 6.3 mm jack instrument cable
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2 × antennas
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NT power supply
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Rackmount accessories
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Documentation
Key Features
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Operating frequency range: 606.2–662 MHz
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24-bit digital audio quality with wide dynamic range
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Very low latency (approximately 1.9 ms)
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Automatic frequency coordination using the Smart Assist app
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Up to 90 channels depending on environment
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56 MHz wide switching bandwidth
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Digital UHF transmission with no companding
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Rugged metal bodypack transmitter
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OLED displays on both transmitter and receiver
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AES 256-bit encryption for secure transmission
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CI1 instrument cable provides clean signal path for electric guitars, basses, keyboards, and instruments with active or passive pickups
Technical Specifications
EW-D Receiver:
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Outputs: balanced XLR + unbalanced 6.3 mm jack
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Frequency response: 20 Hz – 20 kHz
EW-D Bodypack Transmitter:
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Connector: 3-pin locking mini-jack for CI1 cable
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RF output: up to 10 mW
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Power: BA 70 rechargeable battery or 2 × AA batteries
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Runtime: up to 8 hours (with BA 70)
