Shure UA844+SWB — manual 4.2 (2025-D)
Distributor RF connections, power and variants. PDF page 4 identifies UA844+SWB; this is not the UA874 antenna manual.
Shure UA844+SWB and UA874: RF distribution for events
Organize receiving antennas for a wireless microphone rack and plan coverage you can check before doors open.
Ask about rental, purchase or integration
Tell us how you plan to use it, along with the date and venue if known. We can assess equipment, integration, preparation, and technical support. The proposal will confirm configuration, availability, and terms.
Live-event applications
For a multi-mic panel or band, shared antennas can simplify the rack. Start with the frequency bands of every component and the stage layout rather than an arbitrary gain setting.
Pre-show preparation
- Identify receiver models, each UA874 band and the UA844 variant; map separate A and B paths to every receiver.
- Document receiver power separately from RF cabling. Check compatible models, voltage, and leads. Do not power another distributor from the UA844 DC outputs intended for receivers.
- Calculate losses in 50-ohm coax and verify the active antenna DC supply. Schedule gain changes outside the program.
- Coordinate frequencies and walk the actual performance areas with all planned transmitters operating; log RF, audio and dropouts by receiver.
Troubleshooting
If several receivers fail together, inspect their common antenna, power and coax path first. If only one fails, compare its A/B branches and transmitter. For overload indications, review levels and placement; adding gain can make the problem worse.
Alternatives and backup
For a few channels over short distances, evaluate compatible local antennas. A wired microphone can cover a fixed presenter. Additional racks need an engineered cascade based on the manual rather than improvised splitters.
What we need for a proposal
Start with rack and stage photos, the event program, or a rough diagram. If available, add receiver models and bands, cable runs, and the simultaneous channel count. We can use that information to assess antenna distribution, RF coordination, and technical support; the proposal will specify the configuration and availability.
Frequently asked questions
Can the UA874 transmit an in-ear monitor feed?
No. It is a receiving antenna; monitor transmitters require a different compatible solution.
Does more antenna gain mean more range?
Not necessarily. Base gain on losses and levels and schedule a walk test before the audience arrives.
Does the distributor coordinate frequencies?
It does not replace coordination. Review permitted spectrum, simultaneous transmitters and the event RF environment.
Documentation and preparation
23/10/2026
Manuals and documents
Documents are in English. Reader controls follow the language of this page.
Shure UA874Z — UA874 family reference (2017)
Official guide titled UA874Z. Page 3 distinguishes US, E, WB, Z16, Z17, Z18, X and XA variants. Before applying a frequency range, check the antenna suffix and its match to the receiver.