The Xvive U45R4 In-Ear Monitor Wireless System (4-Receiver)
The U45R4 system comprises a transmitter that connects to an audio source and four belt-pack receivers for earphones, headphones, or in-ear monitors — letting an entire band share the same monitor mix wirelessly. It delivers high-resolution, 24-bit/48kHz audio with a wide, smooth frequency response, operating on the less-crowded 5.8GHz ISM band for reliable, interference-resistant performance.

Built for Real-World Monitoring
Typical applications include monitor mixing, group communication, recording, private practice, and band monitoring, with up to six simultaneous systems supported in one venue — meaning the U45R4 can share a single transmitted mix across four listeners while leaving room for other independent wireless systems running in the same room.
Reliable, Low-Latency Performance
Operating on the 5.8GHz band keeps the U45R4 clear of the interference that plagues busier frequencies, while just 5ms of latency and a 110dB signal-to-noise ratio mean what every receiver hears matches what's actually happening in real time. A wide 20Hz–20kHz frequency response and 0.2% total harmonic distortion keep the sound faithful across the full range, whether the mix is a click track or a full band monitor feed.
All-Day Battery, Ready When You Are
Each receiver's rechargeable battery runs up to 5 hours per charge and recharges via USB in as little as 1.5–2.5 hours — and stays usable while charging, so the whole band is never fully sidelined between sets. At just 90g for the transmitter and 118g per receiver, the U45R4 stays out of the way whether it's clipped to a belt or tucked into a pocket.
Why We Love This
Our Gear Experts reach for the U45R4 when an entire band needs the same in-ear monitor mix without running four separate systems. The 5.8GHz band means fewer dropouts in busy venues, and one transmitter feeding four receivers keeps setup simple and cost-effective compared to buying multiple standalone systems. Combined with genuinely low latency, it's a wireless IEM solution built for bands who monitor together.
Features:
- One transmitter shares a single mix across 4 receivers
- 5.8GHz ISM band for reliable, interference-resistant performance
- 24-bit/48kHz high-resolution audio
- Ultra-low 5ms latency
- 100-foot line-of-sight operating range
- Up to 6 simultaneous systems supported in one venue
- 110dB signal-to-noise ratio, 110dB dynamic range
- 20Hz–20kHz frequency response, 0.2% THD
- Rechargeable batteries, up to 5 hours per charge
- Usable while charging, 1.5–2.5 hour full recharge