Sennheiser EW-D ME2/835-S SET (R4-9) Digital Wireless Combo Microphone System (R4-9: 552 to 607 MHz) - 508772

Product Overview

The Sennheiser EW-D ME2/835-S SET (R4-9) is a dual-transmitter digital wireless microphone system that provides both a body-worn lavalier and a handheld vocal microphone in a single package. Operating in the R4-9 frequency band (552–607 MHz), the system delivers 24-bit digital audio with 134 dB of dynamic range and 1.9 ms latency — performance benchmarks derived from Sennheiser’s higher-end Digital 6000 and 9000 platforms. The set includes an SK EW-D bodypack transmitter with ME 2-II omnidirectional lavalier, an SKM EW-D handheld transmitter with 835-S cardioid dynamic capsule, and a single-channel EW-D rackmount receiver with intelligent switching diversity. Bluetooth-based setup via the Sennheiser smart assist app makes channel coordination and transmitter pairing fast and straightforward.

Product Description

The EW-D ME2/835-S SET gives AV integrators, rental companies, and end users a complete two-transmitter UHF digital wireless package without the need to source and match components separately. The R4-9 band occupies 552–607 MHz, a frequency range that remains legally available for wireless microphone use in the United States and offers a 56 MHz operating bandwidth with 2,240 selectable frequencies on an equidistant tuning grid. That equidistant grid — borrowed directly from the Digital 6000/9000 architecture — eliminates the intermodulation calculations required for traditional analog frequency coordination, allowing up to 90 transmitters to operate simultaneously within the band. The SK EW-D bodypack transmitter pairs with the included ME 2-II omni lavalier microphone, which features a 1.6 m cable, making it suitable for clip-on placement on clothing, hair, or a headset mount. The SKM EW-D handheld transmitter is fitted with the 835-S capsule — a cardioid dynamic designed for live vocal performance, providing feedback rejection and handling noise resistance appropriate for stage and podium use. Both transmitters accept standard AA batteries for up to 8 hours of runtime, or the optional Sennheiser BA 2015 rechargeable battery pack for up to 12 hours. The single-channel EW-D receiver occupies one rack unit and provides balanced XLR and unbalanced 6.35 mm audio outputs, a gain range of ∜3 to +42 dB in 3 dB steps, and 20 Hz–20 kHz frequency response within ±3 dB. Intelligent switching diversity on the receiver ensures reliable RF performance in multipath-prone environments. Transmitter pairing is accomplished via Bluetooth using the Sennheiser smart assist app (Android and iOS), eliminating IR sync wands and simplifying deployment for front-of-house and production teams.

Key Features

• Dual Transmitter Combo Set — Includes SK EW-D bodypack with ME 2-II omni lavalier and SKM EW-D handheld with 835-S cardioid capsule.
• R4-9 Frequency Band — Operates at 552–607 MHz with 56 MHz bandwidth and 2,240 selectable frequencies.
• 24-Bit Digital Audio — Fully digital UHF transmission with 134 dB dynamic range and 1.9 ms system latency.
• Equidistant Tuning Grid — No intermodulation calculations needed; supports up to 90 simultaneous transmitters per band.
• Intelligent Switching Diversity — Receiver uses diversity antenna switching to maintain RF link integrity in multipath environments.
• Bluetooth Setup via Smart Assist App — Android and iOS app handles transmitter pairing, frequency coordination, and parameter adjustment remotely.
• Flexible Battery Options — Standard AA alkaline batteries (8 hours) or optional Sennheiser rechargeable pack (12 hours); bodypack charges via USB-C.
• ME 2-II Omni Lavalier — Omnidirectional clip-on microphone with 1.6 m cable, suited for speech and broadcast applications.
• 835-S Cardioid Dynamic Capsule — Live-performance vocal capsule with cardioid pattern for feedback rejection and stage use.
• Rackmount 1U Receiver — Single-channel receiver with balanced XLR output, gain range ∜3 to +42 dB, and AC/DC adapter included.
• Auto-Scan Frequency Selection — Receiver scans the band and identifies clean frequencies automatically.

Typical Applications

• Corporate presentations and conference rooms requiring a presenter lavalier plus a Q&A handheld microphone
• Houses of worship with clergy using a lavalier and a secondary handheld for congregation interaction
• Educational institutions and lecture halls needing flexible wireless microphone coverage
• Live theatrical productions and stage performances where performers require both body-worn and handheld options
• AV rental inventories serving multi-purpose event spaces
• Broadcast and video production setups requiring a discrete lavalier with a handheld backup

Technical Specifications

Frequently Asked Questions

Q: What is included in the EW-D ME2/835-S SET (R4-9)?

The set includes one SK EW-D bodypack transmitter with ME 2-II omnidirectional lavalier microphone (1.6 m cable), one SKM EW-D handheld transmitter fitted with the 835-S cardioid dynamic capsule, one single-channel EW-D rackmount receiver, and an AC/DC power adapter for the receiver.

Q: What is the R4-9 frequency band and is it legal in the United States?

R4-9 covers 552–607 MHz. This frequency range is FCC-legal for wireless microphone use in the United States. Always verify current FCC regulations and check for local frequency coordination requirements before deployment.

Q: Can both transmitters be used at the same time with the included receiver?

No. The included EW-D receiver is a single-channel unit. Only one transmitter can be active and received at a time. To use both transmitters simultaneously, a second EW-D receiver is required. The combo set is designed for scenarios where you switch between the lavalier and handheld, not use them concurrently.

Q: How are transmitters paired to the receiver?

Pairing is done via Bluetooth using the Sennheiser smart assist app on an Android or iOS device. The app handles frequency scanning, channel assignment, and transmitter configuration without requiring a physical IR sync step.

Q: What batteries do the transmitters use?

Both transmitters accept standard AA batteries, providing approximately 8 hours of runtime. The optional Sennheiser BA 2015 rechargeable battery pack extends runtime to approximately 12 hours and can be recharged via USB-C while in the bodypack.

Q: How many channels can operate simultaneously in the R4-9 band?

Up to 90 EW-D transmitters can operate simultaneously within the R4-9 band, thanks to the equidistant tuning grid that eliminates intermodulation conflicts between channels.

Q: What audio outputs does the EW-D receiver provide?

The receiver provides a balanced XLR output and an unbalanced 6.35 mm (1/4″) output. Gain is adjustable from −3 to +42 dB in 3 dB steps from the front panel or the smart assist app.

Q: How does the EW-D ME2/835-S SET differ from the R1-6 version?

The two sets are identical in components and features. The only difference is the frequency band: R4-9 operates at 552–607 MHz while R1-6 operates at 520–576 MHz. Choose the band that best avoids local interference in your deployment area.