NUX B-7 PRO Wireless In-Ear Monitoring System
User Manual
Overview
Thank you for choosing the NUX B-7 PRO wireless in-ear monitoring system! The NUX B-7 PRO is a personal in-ear monitoring system featuring automatic configuration, a 2.4 GHz interference-free transmission frequency, and high-quality 24 Bit/48 kHz stereo audio transmission. The signal transmission latency is as low as 7.33 ms, with a range of up to 50 meters. The transmitter features two combo jacks (XLR and 6.35mm jack) for stereo or mono signal input. The receiver can be easily attached to your shirt, belt, or guitar strap via its clip. Thanks to our latest frequency hopping technology, the B-7 PRO is reliable and stable during stage performances.
The user-friendly and coordinated system is very easy to operate: simply turn on the transmitter (TX) and receiver (RX) to establish a connection within seconds. Each wireless set has a unique pairing algorithm for automatic detection and configuration of respective IDs.
Features
- Operating Frequency Band: 2.400 to 2.483.5 MHz
- Audio Quality: 24 Bit / 48 kHz
- Range: Up to 50 meters
- Frequency Response: 20 Hz – 20 kHz
- Latency: 7.33 ms (Low-Latency setting) – 10.85 ms (Default setting) – 14.33 ms (Safe setting)
- THD+N: <0.01% typical
- Battery Operation Time (Transmitter): Up to 6 hours
- Battery Operation Time (Receiver): Up to 6 hours
Transmitter (TX) Interface & I/O
Controls
- LCD Display: High-resolution LCD color display.
- VOLUME/SELECT/PARA Knob: Turn to adjust output volume. Press to access settings or confirm a selection. Turn to select an option or adjust parameters.
- HOME Button: Press to return to the home screen.
- BACK TO Button: Press to return to settings.
Ports
- INPUT-L (MONO) Combo Jack: Connect your audio source (e.g., mixer, audio interface) using an XLR cable for balanced connection or a 6.35mm jack cable for unbalanced connection. Maximum signal level is +22 dBu.
- INPUT-R (Combo Jack): Connect your audio source (e.g., mixer, audio interface) using an XLR cable for balanced connection or a 6.35mm jack cable for unbalanced connection. Maximum signal level is +22 dBu.
- AUX IN Jack: Connect the audio signal from your smartphone or other audio device.
- DC 9V Jack: Connect the supplied power adapter to power on the transmitter. Use only the original power adapter to avoid damage.
- USB-C Port: Connect to your computer via USB cable for firmware updates or recording. Can also connect to a smartphone to input audio signals.
- 1/4" Screw Thread: Located on the bottom of the transmitter, allows mounting to compatible brackets (e.g., GoPro) for flexible placement.
Receiver (RX) Interface & I/O
Controls
- POWER ON/OFF/MUTE Button: Press and hold to turn the receiver on or off. Press and hold for 1 second to mute audio output when powered on and paired.
- VOLUME +/- Buttons: Press to increase or decrease the output volume.
Ports
- PHONE Jack: Connect your headphones or in-ear monitors for monitoring.
- USB-C Jack: Charge the receiver using a 5V/0.5A power adapter.
LED Indicators
- Signal Display LED:
Green: Paired with transmitter
Green flashing: Pairing with transmitter
Red: Mute
Red flashing: Not paired with transmitter - Battery Capacity LED:
Green (70% ~ 100%): Fully charged
Orange (40% ~ 70%): Medium charge
Red (15% ~ 40%): Low charge
Red flashing (10% ~ 15%): Minimal charge
Auto-shutdown: <10%
Connections
The B-7 PRO Wireless System can be connected to various devices:
- Headphones: Connect to the RX PHONE jack.
- Mixer: Connect to the TX INPUT-L/R jacks.
- MP3 Player/Phone/Adapter: Connect to the TX AUX IN jack.
- Computer: Connect to the TX USB-C port for audio input/output.
- Phone: Connect to the TX USB-C port for audio input/output.
Practical Use
Getting the B-7 PRO up and running is straightforward as the system is pre-matched from the factory. Simply turn on the transmitter and receiver. The devices should recognize each other instantly and automatically select the best channel for a stable connection.
- Press and hold the power buttons on the transmitter and receiver. The two devices will automatically pair.
- The transmitter displays the input/output level, signal transmission level, and battery status of the transmitter/receiver.
- Connect the transmitter to your mixer. Connect your headphones to the receiver and attach it to your shirt, belt, or guitar strap. You are now ready to go.
- Use the knob on the transmitter's control panel to adjust the output volume. Press the knob to set the L/R panorama of the output.
- When you no longer need the B-7 PRO, simply press and hold the power button to turn off the transmitter and receiver.
- Setup is now complete. Enjoy wireless stereo monitoring with the B-7 PRO!
Tips for Improving Wireless System Performance
If you experience interference or dropouts when using the B-7 PRO wireless in-ear monitor system, try the following:
- For best performance, position the receiver further away from WiFi access points, computers, Bluetooth devices, or other active 2.4 GHz sources.
- Adjust the B-7 PRO's transmission parameters for the best balance between low latency and stability.
- Ensure the transmitter is sufficiently charged and powered on.
- Make sure there are no large physical objects in the line of sight between the transmitter and receiver.
- Reduce the distance between the transmitter and receiver. For example, when using the system on stage, place the receiver closer to the transmitter and connect via a long cable to the mixer or amplifier.
- If using two or more B-7 PRO units or other wireless systems, maintain a distance of more than 1 meter between transmitters and receivers.
- Disable unnecessary WiFi connections on computers, mobile phones, and other portable devices.
- Avoid high WiFi traffic activities such as downloading large files or watching movies.
- Avoid placing the transmitter and receiver in locations with metal or other dense materials.
- During soundcheck, mark problem areas and ask presenters or artists to avoid these zones.
- The optimal operating distance is 10 to 35 meters.
Charging
Charging the Transmitter
The B-7 PRO comes with a 9V/1.2A DC power adapter. Connect the adapter to the DC jack to charge the transmitter. Caution: Always use the original 9V/1.2A DC power adapter to charge the B-7 PRO transmitter. Using a non-certified adapter may damage the circuitry. Caution: The USB-C port is not intended for charging the transmitter.
Charging the Receiver
There are two ways to charge the receiver:
- Charge via the Transmitter: Turn on the transmitter and place the receiver in the transmitter's charging position. The receiver's LED will light up when it begins charging. If the transmitter is off, press the POWER button to turn it on to charge the receiver. When the charging configuration is set correctly, the LCD display will show "RX IS CHARGING...".
- Charge via USB-C Port: Use a 5V/0.5A power adapter to charge the receiver through its USB-C port.
USB Audio & Recording
Connect the B-7 PRO transmitter to your smartphone or computer to use the B-7 PRO as a USB interface for recording.
Smartphone Connection
Connect the transmitter to your smartphone using a USB cable and configure your phone as a USB audio accessory. You can then start recording. When connecting your smartphone to the B-7 PRO for the first time, you may be presented with two options on your phone's screen. Please select the "USB headphones device" option. Alternatively, check and configure the "Connected To Headphones" option as shown below. It is recommended to use a USB cable that fully supports data transfer when connecting this product to a mobile device with USB-C.
macOS Connection
Connect the transmitter to your Mac via a USB cable and set the B-7 PRO as the USB input and output for your computer. You can then start recording.
Windows Connection
First, you need to install the "NUX ASIO Driver" on your computer. Visit www.nuxaudio.com to download the software. After installing the NUX ASIO driver, connect the B-7 PRO transmitter to your computer via a USB cable. The system will then be offered as a USB audio device. You can then start recording.
System Settings
DISPLAY
Select your preferred startup screen. Adjust the display brightness. Upload a GIF and select it as the boot-up picture. To upload a GIF and set it as the startup image: Download the Boot-up Picture app from www.nuxaudio.com. Select "UPLOAD PICTURE" and confirm. Connect the B-7 PRO to your computer via the USB-C port. Upload a GIF image using the app.
TRANSMITTING
You can set the transmission parameter between LOW LATENCY and STABLE. The leftmost position offers the lowest transmission latency (approx. 7.33 ms). The rightmost position sets the transmission for anti-interference. This mode is for users who want more stability in various environments, such as when nearby WiFi devices cause interference with wireless transmission. In this setting, the transmission latency is slightly higher (approx. 14.33 ms). For best performance, check for nearby WiFi devices and set the B-7 PRO's transmission function to the best position between low latency and stability.
INPUT
You can optionally set the B-7 PRO input to STEREO or MONO(L). If your mixer offers STEREO outputs, please select the STEREO option. If your mixer has a MONO output, please select the MONO(L) option. In this case, the B-7 PRO will transmit the L channel signal to the R channel as well.
PHONES LEVEL
You can adjust the output volume for the headphones connected to the transmitter.
AUX IN LEVEL
You can adjust the volume for the Aux In.
LANGUAGE
Select your preferred language for the system here.
SYSTEM INFO
System information for the B-7 PRO is displayed here.
Re-assign ID & Manual Pairing
The IDs of the transmitter and receiver modules of each B-7 PRO set are matched from the factory. If you need to re-assign the IDs for any reason or pair a receiver with a transmitter from a different set, follow these steps:
- Receiver: Turn on the receiver and press the power button. The transmitter and receiver will pair with each other.
- Transmitter: Turn on the transmitter and then press and hold the "Back to" button. "PAIRING..." will be displayed on the screen as shown below.
- If pairing is successful, "PAIRED" will be displayed.
Specifications
| Operating Frequency Band | 2.400 to 2.483.5 MHz |
| Transmission Mode | Frequency Hopping |
| RF Output Power | Max. 10 mW E.I.R.P. |
| Audio Quality | 24 Bit / 48 kHz |
| Frequency Response | 20 Hz – 20 kHz |
| Latency | 7.33 ms (Low-Latency setting) – 10.85 ms (Default setting) – 14.33 ms (Safe setting) |
| Unbalanced Input Impedance | 10 kΩ |
| Balanced Input Impedance | 20 kΩ |
| AUX Input Level | Max. 2.1 Vrms (8.7 dBu) |
| Balanced Input Level | Max. 9.8 Vrms (22 dBu) |
| Headphone Output Impedance | Min. 13 Ω |
| Maximum Headphone Output Power per Channel | 57 mW (THD < 0.1% RLOAD = 16 Ω, 1 kHz) |
| Channel Separation | -105 dB |
| THD+N | <0.01% typical |
| Dynamic Range | 110 dB A-weighted |
| Output Level Adjustment Range | Mute, -86 dB to +12 dB |
| Auto Power Off | Shuts down after 10 minutes of no connection or if the connection is interrupted |
| Internal Battery Capacity | Rechargeable Li-Polymer Battery (Transmitter: 3.7V/3000mAh; Receiver: 3.7V/400mAh) |
| Battery Operation Time | Transmitter: Up to 6 hours Receiver: Up to 6 hours |
| Power Requirement (Transmitter) | 9 V DC, min. 1 A, power supply via center negative |
| Range | Up to 50 m maximum |
| Dimensions | Transmitter: 140 (L) × 97 (W) × 53 (H) mm Receiver: 47 (L) × 71 (W) × 22 (H) mm |
| Weight | Transmitter: 525 g Receiver: 51 g |
Specifications and features are subject to change without prior notice.
Accessories
- 9 V DC Power Adapter, 1.2 A
- USB-C Cable
- USB-C to USB-A Adapter
- 1/4" Nut (for GO PRO clamp)
- User Manual
- Warranty Card
- NUX Stickers
Compliance
CE Marking
The CE marking affixed to our company's power supply products fully complies with the harmonized standards EN 55032:2015/AC:2016, EN 55035:2017, EN 61000-3-2:2014, and EN 61000-3-3:2013, in accordance with the European Council's Directive 2014/30/EU on electromagnetic compatibility.
FCC Warning
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC Radiation Exposure Statements
FCC TX (Transmitter) Radiation Exposure Statement: The device has been evaluated to meet general RF exposure requirements. The device can be used in portable exposure conditions without restriction.
FCC RX (Receiver) Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and your body.
