The U4R Wireless In-Ear Monitor System from Xvive Audio provides performers and presenters a hands-free, cost-effective, and expandable solution that supplies 24-bit/48 kbps digital sound quality to their favorite in-ear and headphone monitors. This configuration includes a single receiver and a single transmitter; ready for plug-and-play use in a wide variety of settings including musical venues and and theatres, houses of worship, schools, corporate conference rooms, and more.

The portable, easy-to-use U4 system features road-worthy components housed in tough molded-plastic and cast-metal chassis built to handle the rigors of touring and designed to work with a huge variety of audio gear. The components are powered by internal non-replaceable batteries that offer 5 hours of operating time and are recharged via USB ports.

The transmitter works with basically any mixer or other device that has an available balanced XLR or unbalanced 1/4" output jack. Just plug the transmitter in, and it will broadcast the incoming audio to any of its six selectable 2.4 GHz channels. Simply set the bodypack receivers to the same channel and you're good to go. The system provides a 90' line-of-sight transmission range and a 5 ms latency, low enough for musical applications.

2.4 GHz Band Works Anywhere in the World    Works with Any Type of Headphones    Transmitter Plugs into XLR or 1/4" Gear    5 Hours on Built-In Rechargeable Battery    24-Bit/48 kb/s, 5 ms Latency

• Simple to use: plug in the tranmitter and set the transmitter and receiver to the same channel—that's it
• The 2.4 GHz system works anywhere in the world—ready to go where the tour goes
• The U4 receiver can work with multiple transmitters, you can add more as you need them
• The system offers 6 wireless channels to choose from, allowing you to expand the system with additional transmitters (available separately) and send different monitor mixes, specifically tailored to the needs of your performers

• The U4 offers 24-bit / 48 kb/s digital audio with a 107 dB dynamic range and a 20 Hz to 20 kHz frequency range
• Transmission range is 90' line of sight and the latency is 5 ms
• A built-in rechargeable battery powers each component for 5 hours 
• Belt clip and volume control on receivers
• Works with a wide range of in-ear and headphone monitors

• LINE MODE: Use with mixers or other professional audio devices that send line-level signals.
• AUX MODE: Use when connecting consumer audio devices such as portable audio players or computers

Related Questions and Answers

Q: 1. Does this unit support stereo audio? I’m hoping to use it as an inexpensive way to use my in-ear monitors.

A: This unit only accepts a mono audio input.

Q: 2. can i leave the usb power plugged in on the transmitter 100% of the time? it will function plugged into power? would love to keep it a the soundboard and not have to think about charging. only the receiver would need to be charged as needed. thanks!

A: Xvive recommends powering off the components of the Xvive Audio U4 Wireless In-Ear Monitor System with One Receiver while charging. The user guide states: "Please do not use U4 when charging, which may reduce battery life." Essentially, while the transmitter may be able to operate while charged, it may be detrimental to the long term battery life and performance of the unit to do so.

Q: 3. Phantom +48 v power ? Will it work with a Mic that needs +48v phantom power?

A: The transmitter plugs into a dynamic microphone or into DI or XLR output gear, and the receiver plugs into a live sound mixer, portable PA system, or a recorder. This device is designed to be used only with dynamic microphones which do not use phantom power. This device cannot supply phantom power.

Q: 4. Can I put the xvive u4 on the mixer or on a speaker without the risk of it burning (as happened to me with the sennheiser ew100 g3 transmitter???)

A: The Xvive Audio U4 Wireless In-Ear Monitor System can be used with a mixer or passive loudspeaker, but it should be connected using a cable to avoid putting undue strain on the XLR connector.

Q: 5. How many transmitters can I use simultaneously?

A: You can use up to 6 transmitters simultaneously in the Xvive Audio U4 Wireless In-Ear Monitor System.

Q: 6. Does it include the 1/4" to XLR Adapter?

A: Yes, the Xvive Audio U4 Wireless In-Ear Monitor System with One Receiver includes a 1/4" to XLR adapter.

Q: 7. Is the battery on the trans-mitter replaceable?

A: No, the built-in rechargeable batteries for the Xvive Audio U4 Wireless In-Ear Monitor System are not user replaceable.

Q: 8. Can the transmitter be plugged into a soundboard's XLR main output and can the receiver be plugged into the XLR input of the Canon XA11 Camcorder (B&H # CAXA11 MFR # 2218C002)? If so, should the XA11's input be set to Line, MIC, or MIC +48?

A: You can not plug the xlr transmitter directly into a mixer. However, you can plug an xlr attenuator like this B&H # PEIMA1030 into the mixer via an xlr cable, then the Xvive transmitter to that. This will change the line level out of the mixer to a mic level that the transmitter can handle. The receiver would plug into the camera, and the camera would be set to mic level.

Q: 9. can this be expanded to have more receivers later?

A: Yes, you can add more U4R receivers to expand the monitoring system.

Q: 10. will one transmitter work two receivers ?

A: Yes, you can send audio from one transmitter to two receivers.