Sennheiser EW-D CI1 Digital Wireless Instrument System

The Sennheiser 508730 is a wireless instrument system that sends your signal with digital clarity and gives you the freedom to move anywhere on stage. It carries the EW-D CI1 designation, which means you get a transmitter that clips to your belt and a CI1 cable that plugs straight into the quarter-inch jack on your guitar, bass, keyboard, or other line-level instrument.

The package brings together a receiver that fits into half a rack space, a metal bodypack transmitter, and detachable antennas for easy placement. Setup is fast: open the free EW-D Smart Assist app on your phone, scan the spectrum, and let the system choose a clean channel from the 56 MHz window that offers up to 2 240 selectable frequencies.

Once connected, the 24-bit transmission and a 134 dB dynamic range preserve every nuance. Quiet fingerpicking remains noise-free, and loud power chords stay punchy without clipping or distortion. Your tone feels exactly like it does with a cable, just without the cable slack underfoot.

Power options adapt to the length of the show. Two AA batteries deliver about eight hours of run time. When you add the lithium-ion pack (sold separately), the transmitter runs for roughly twelve hours and even displays the remaining time down to the minute.

The transmitter housing is made from metal and built for the demands of touring life, while the receiver includes a rack kit so you can install it in a touring rig or keep it on top of an amp during rehearsals. Whether you play clubs on the weekend, handle worship services, manage rentals, or tour full time, the EW-D CI1 version delivers stable performance, straightforward control, and cable-like tone in any environment.

• Wireless system that uses digital transmission and ships with the CI1 cable for a quarter-inch jack
• Audio remains free from noise and interference
• 56 MHz tuning range with up to 2 240 selectable frequencies
• EW-D Smart Assist app handles setup and monitoring from a phone
• 134 dB dynamic range that keeps quiet passages and loud peaks intact
• Up to 12 hours of operation when you add the lithium-ion battery (sold separately)
• Around 8 hours of run time when AA batteries are used
• Package includes rack-mountable receiver, metal bodypack transmitter, CI1 cable, rack kit, and power supply