Sennheiser SR2020-D-US Dual Rack-Mountable RF Transmitter/Receiver Kit

Product Overview

The Sennheiser SR2020-D-US Dual Rack-Mountable RF Transmitter/Receiver Kit is a complete, ADA-compliant assistive listening system designed for large venues where multiple zones or redundant coverage are required. Operating in the license-free 926–928 MHz frequency band, this dual rack-mountable RF assistive listening system includes two SR2020-D-US transmitters and five HDE2020-D-US stethoset receivers — providing everything needed to deploy a production-ready wireless listening loop out of the box. The kit is well suited to houses of worship, auditoriums, and government spaces where ADA compliance for assistive listening is a legal requirement.

Product Description

The SR2020-D-US Dual kit ships with two single-channel, rack-mountable RF transmitters that install in a standard 19" equipment rack. Each transmitter features a backlit LCD display for at-a-glance status monitoring and an intuitive menu for fast channel selection and level adjustments. The balanced XLR mic/line input accepts signals from microphones, mixers, and other audio sources, with switchable 48V phantom power for condenser microphone compatibility. A front-panel 1/4" headphone jack allows the AV operator to monitor the transmitted signal directly at the rack without additional equipment.

The system operates across 6 selectable channels in tour-guide mode and 8 channels in conference mode within the 926–928 MHz ISM band — no FCC license required. With a stated indoor range of up to 50 m (160 ft) per transmitter and up to 100 m (330 ft) outdoors, coverage can be further extended by adding optional remote antennas. The dual-transmitter configuration means you can cover two separate rooms simultaneously, run a primary and backup channel, or serve different language streams in a multilingual interpretation setup.

The five included HDE2020-D-US stethoset receivers each feature a backlit LCD display, a large rotary volume control, and an auto on/off function that activates when the headset is put on and powers down when removed — extending battery life between charges. The in-ear earpieces deliver consistent audio while reducing ambient noise bleed. An integrated rechargeable battery provides extended operating time, and the included carrying case doubles as a charging station for all five receivers. ADA-required signage is included in the kit.

Key Features

• License-Free 926–928 MHz RF Band — Operates in the US ISM band with no FCC license required, reducing regulatory overhead for venues.
• Dual Rack-Mountable Transmitters — Both transmitters mount in a standard 19" rack via the included GA 2 rack-mount kit, keeping equipment organized in a permanent installation.
• 6/8 Selectable Channels — Six channels in tour-guide mode, eight in conference mode, allowing multiple systems to coexist without interference.
• Balanced XLR Input with 48V Phantom Power — Accepts mic or line-level signals and powers condenser microphones directly, eliminating the need for an external phantom supply.
• Front-Panel Monitoring Jack — 1/4" headphone output on each transmitter allows the operator to verify the outgoing audio signal at the rack.
• Auto On/Off Stethoset Receivers — Receivers power on when worn and off when removed, preserving battery charge between sessions without manual intervention.
• Charging Carry Case Included — The five stethoset receivers store and charge in the included carrying case, simplifying receiver management between events.
• Expandable RF Coverage — Optional remote antennas can extend coverage beyond the default range for larger or architecturally complex venues.
• ADA Signage Included — Required ADA assistive listening signage ships with the kit, addressing one of the common compliance checklist items.
• Backlit LCD on Transmitters and Receivers — Operators and users can read channel and status information in low-light environments without difficulty.

Typical Applications

• House of worship
• Auditorium
• Government space
• Conference room

Technical Specifications

Frequently Asked Questions

Q: Does this system require an FCC license to operate in the United States?

No. The SR2020-D-US operates in the 926–928 MHz ISM band, which is license-free in the United States. No FCC license application or frequency coordination is required before deployment.

Q: How does the dual kit differ from the single kit?

The dual kit includes two SR2020-D-US transmitters instead of one. This allows simultaneous transmission on two separate channels — useful for covering two rooms, running a primary and backup channel, or providing multilingual interpretation streams from a single rack position.

Q: How many receivers can operate simultaneously per transmitter?

Each SR2020-D-US transmitter broadcasts on a single channel, so the number of simultaneous listeners per channel is theoretically unlimited — any number of HDE2020-D-US stethoset receivers or compatible EK2020-D-US body-pack receivers tuned to that channel will receive the audio.

Q: Is this system ADA compliant for assistive listening?

The kit is designed to meet ADA Section 4.33 requirements for assistive listening systems. ADA-required signage is included. Venues should verify their specific compliance obligations with a qualified AV consultant or accessibility specialist.

Q: What audio sources can I connect to the transmitter?

The balanced XLR-3F input accepts mic-level signals (2 mV–125 mV) and line-level signals (160 mV–2.5 V). The 48V phantom power switch enables use of condenser microphones. You can feed a mixer output, a direct mic, a hearing loop induction source, or another analog audio device.

Q: Can the coverage area be extended beyond the default range?

Yes. Optional remote antennas can be added to expand RF coverage for larger rooms or venues with architectural obstacles such as balconies or divided seating areas.

Q: What is the warranty on this product?

Sennheiser provides a standard manufacturer's warranty on the SR2020-D-US. Contact Creation Networks at creationnetworks.net for current warranty terms and support options.

Q: Can I integrate this system with an existing AV infrastructure?

Yes. The balanced XLR input connects directly to a mixer or DSP output. The front-panel headphone jack allows in-rack monitoring. The system operates independently of any network infrastructure — no IP configuration is required.