Sennheiser EW-D CI1 Digital Wireless Instrument System

Overview

The Sennheiser 508730 is a digital wireless instrument system designed to deliver clear, cable-like audio for musicians who need freedom of movement on stage. It includes a metal bodypack transmitter that clips to your belt and a CI1 cable that connects directly to your guitar, bass, keyboard, or other line-level instruments. With a 56 MHz tuning range offering up to 2,240 selectable frequencies and a 134 dB dynamic range, this system preserves every detail of your performance, from quiet fingerpicking to powerful chords.

Key features

• Digital transmission ensures audio remains free from noise and interference, maintaining your instrument’s true tone.
• EW-D Smart Assist app simplifies setup and monitoring by scanning the spectrum and selecting a clean channel automatically.
• Metal transmitter housing built to withstand the rigors of touring and frequent use.
• Receiver fits into half a rack space and includes a rack kit for flexible installation in touring rigs or rehearsal setups.
• Power options include two AA batteries for about eight hours of runtime or an optional lithium-ion pack for up to twelve hours with precise battery time display.
• Detachable antennas on the receiver allow for optimal placement to ensure stable signal reception.
• Maintains a wide dynamic range of 134 dB to capture both subtle nuances and loud peaks without distortion.

Key specs

• Tuning range: 56 MHz
• Selectable frequencies: up to 2,240
• Dynamic range: 134 dB
• Transmitter power source: 2 AA batteries or optional lithium-ion pack
• Battery life: approximately 8 hours (AA batteries), up to 12 hours (lithium-ion pack)
• Receiver size: half rack space
• Connection cable: CI1 quarter-inch jack cable included

Connectivity and compatibility

The system is designed to work seamlessly with a wide range of line-level instruments, including electric guitars, basses, and keyboards. The included CI1 cable plugs directly into standard quarter-inch instrument jacks, making it easy to integrate into existing setups without adapters or modifications. The receiver’s rack-mountable design fits well in professional touring rigs, while its compact size also suits smaller rehearsal spaces.

Performance and reliability

Thanks to its digital transmission and extensive frequency selection, the system delivers stable, interference-free audio even in crowded RF environments. The 134 dB dynamic range ensures that both the quietest and loudest parts of your performance come through clearly, preserving the natural character of your instrument. The robust metal transmitter housing and detachable antennas contribute to reliable operation during demanding live performances and tours.

Ideal uses and environments

This wireless instrument system is well suited for musicians performing in clubs, houses of worship, rental setups, and touring scenarios. It offers the flexibility to move freely on stage without sacrificing sound quality, making it a strong choice for guitarists, bassists, and keyboard players who want a dependable wireless solution that sounds as good as a cable. Its straightforward setup and monitoring via the smartphone app also make it accessible for users who want quick and reliable operation.