Full Description
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Hear every detail clearly
The U4 is designed to help you hear your monitor mix accurately during rehearsals and performances. High-resolution 24-bit/48kHz audio works alongside a broad 20Hz to 20kHz frequency response, delivering clear sound across the full frequency spectrum. A 107dB signal-to-noise ratio helps preserve detail, making it easier to pick out vocals, instruments, and backing tracks. Whether you're monitoring a full band mix or a specific cue feed, the system maintains a consistent listening experience through a wide range of compatible headphones and in-ear monitors.
Move freely on stage
Cables can restrict movement and create unnecessary clutter around performance spaces. The U4 uses a 2.4GHz wireless connection with a range of up to 90 feet, allowing you to move naturally during rehearsals, performances, and soundchecks. Latency remains below 5ms, helping audio stay closely aligned with your playing or singing. This responsive performance makes it easier to stay locked in with the rest of the band, especially during fast-paced live sets where timing and confidence matter.
Build monitoring systems quickly
The straightforward design keeps setup simple. Connect the transmitter directly to an XLR output or use the included adapter for compatible sources, then match the transmitter and receiver channels. Six selectable channels provide flexibility for different stage setups, while multiple receivers can listen to the same transmitter when performers need the same monitor mix. This makes the U4 useful for solo performers, bands, rehearsal spaces, and production teams looking for a practical monitoring solution without complicated routing.
Recharge and perform longer
Both the transmitter and receiver include built-in rechargeable lithium-ion batteries, reducing the need for disposable batteries and helping keep running costs down. Each unit provides up to five hours of operation on a full charge, covering rehearsals, performances, and most live events. USB charging makes recharging straightforward between sessions. Battery status indicators on both units help you keep track of remaining power, so you can prepare confidently before stepping onto the stage.
Features
- Wireless in-ear monitoring system operating on 2.4GHz
- High-resolution 24-bit/48kHz audio transmission
- Less than 5ms latency for responsive monitoring
- Up to 90 feet wireless operating range
- Six selectable wireless channels
- Multiple receivers can share one transmitter
- Rechargeable transmitter and receiver batteries
- Compatible with balanced XLR and line-level sources
Specifications
System
- Wireless Band: 2400 MHz – 2483.5 MHz
- Working Range: Up to 90 ft
- Frequency Response: 20 Hz – 20 kHz (-3 dB)
- Dynamic Range: 107 dB
- Signal-To-Noise Ratio: 107 dB
- Latency: Less than 5 ms
- Channel Count: Up To 6 Channels
- Audio Resolution: 24-bit/48 kHz
- RF Sensitivity: -88 dBm
- Total Harmonic Distortion: 0.2%
- RF Output Power: 10 mW E.I.R.P. Max
- Operating Temperature Range: -18°C to 57°C
Transmitter
- Dimensions (W x D x H): 30 mm x 28 mm x 100 mm
- Weight: 0.09 kg
- Housing: Molded Plastic And Cast Metal
- Battery: 3.7 V Rechargeable Li-Ion, 860 mAh
- Audio Input Connector: Balanced XLR Male Input
- Input Impedance: 47 kΩ (1 kHz)
- Mode: Aux -10 dBV Max +12.2 dBu, Line +4 dBu Max +22 dBu
- Battery Life: Up To 5 Hours
- Antenna Impedance: 50 Ω
- Antenna Type: 1/4 Wave Sleeve Dipole, Non-Removable
- Number Of Antennas: 1
Receiver
- Dimensions (W x D x H): 47 mm x 41 mm x 60 mm
- Weight: 0.118 kg
- Housing: Molded Plastic And Cast Metal
- Battery: 3.7 V Rechargeable Li-Ion, 1200 mAh
- Output Impedance: 6–600 Ω
- Audio Output Connector: 3.5 mm Stereo Output
- Battery Life: Up To 5 Hours
- Antenna Impedance: 50 Ω
- Antenna Type: 1/4 Wave Sleeve Dipole, Non-Removable
- Number Of Antennas: 2