NUX AXON 3 Studio Reference Monitor

Welcome to the NUX AXON 3 Studio Reference Monitor User Manual.

Overview

Thank you for choosing the NUX AXON 3 Studio Reference Monitor. The AXON 3 is an ultra-compact stereo monitoring system that combines professional quality with unmatched mobility, designed for those who demand precision and clarity. Its bi-amping design delivers an ultra-precise, flat, and detailed sound with physically unbeatable low-frequency extension and impressive maximum sound pressure level, all in a backpack-friendly size.

With 90W RMS power delivered by four amplifiers, the AXON 3 offers exceptional clarity and superior bass reproduction through its 3/4-inch silk dome tweeters and 3-inch neodymium magnet woofers. The woofers extend down to 55Hz, providing deep, rich bass, while the silk dome tweeters deliver soft, precise highs that highlight the finest details of your music. A high-resolution DSP processor enhances performance, providing remarkable accuracy and detail far beyond what you might expect from such compact monitors.

The innovative magnetic feet of the AXON 3 allow for two adjustable tilt angles, decoupling the speakers from surfaces and ensuring optimal sound alignment for any setup. The DSP, paired with a high-quality AD/DA converter, preserves signal integrity, while the integrated EQ for acoustic correction offers 8 factory presets for various environments and 2 customizable slots. In-depth EQ adjustments can be easily made via PC software or a mobile app, enabling professional reference monitoring in any environment.

Versatile connectivity options, including USB-DAC audio, Bluetooth streaming, 1/4" stereo inputs, RCA, and 1/8" AUX inputs, ensure compatibility with a wide range of devices. The high-dynamic DAC can be connected directly to your computer via USB for first-class Hi-Fi sound, while Bluetooth streaming allows seamless playback from your phone or laptop. Older devices like turntables and older music players are supported via RCA and AUX inputs.

Whether you're mixing, mastering, composing, or just enjoying music, the NUX AXON 3 delivers professional audio performance in any situation. It is compact and portable, making it perfect for your studio, listening room, or in your backpack for your next adventure. Experience the perfect blend of precision, versatility, and portability with the NUX AXON 3!

Features

Professional, bi-amplified, two-way monitor speakers with 90W RMS power for balanced performance.
3-inch neodymium magnet woofers for deep bass and 3/4-inch silk dome tweeters for smooth highs.
Precise, flat, and detailed sound with low-frequency extension down to 55 Hz.
Backpack-friendly size with a maximum sound pressure level of 107 dB.
Integrated high-resolution digital signal processing for accurate sound.
Includes AXON STUDIO software and app for customizable acoustic correction.
Adjustable magnetic feet for tilt and improved sound precision.
Stream music instantly via Bluetooth wireless.
High-dynamic USB-AUDIO-DAC for first-class Hi-Fi sound.
Unbalanced RCA stereo inputs for vinyl systems.
Includes 4-pin stereo link cable and power adapter.

Safety Information and Warnings

WARNING! - IMPORTANT SAFETY INSTRUCTIONS BEFORE CONNECTING READ THE INSTRUCTIONS

To reduce the risk of fire or electric shock, do not expose the unit to rain or moisture.

CAUTION

To reduce the risk of fire or electric shock, do not remove any screws. No user-serviceable parts inside. Refer servicing to qualified service personnel.

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.

NOTICE: 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. The device has been evaluated to meet general RF exposure requirements. The device can be used in portable exposure conditions without restriction.

The lightning bolt symbol ⚡ in a triangle means "Electrical Caution!". It indicates the presence of information about operating voltage and the risk of electric shock.

The exclamation mark symbol ❗ in a triangle means "Caution!". Please read the information next to all warning signs.

Use only the supplied power adapter or power cord. If you are unsure of the type of power available, consult your dealer or local power company.
Do not place the unit near heat sources, such as radiators, heat registers, or appliances that produce heat.
Ensure that no objects or liquids enter the cabinet.
Do not attempt to service the unit yourself, as opening or removing covers may expose you to dangerous voltages or other hazards. Refer all servicing to qualified service personnel.
Refer all servicing to qualified service personnel. Servicing is required when the unit has been damaged in any way, such as when the power cord or plug is damaged, liquid has been spilled, or objects have fallen into the unit, the unit has been exposed to rain or moisture, has not operated normally, or has been dropped.
Unplug the power cord from the outlet if the unit is not to be used for extended periods.
Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the unit.
Prolonged listening at high volume levels can cause irreparable hearing damage. Always practice "safe listening".

Follow all instructions and heed all warnings. Keep this manual!

Connections and I/O Jacks

Connecting Devices

Diagram Description: A diagram shows the NUX AXON 3 active speaker on the left and the passive speaker on the right. The active speaker has various input jacks. A mobile phone is shown connecting via Bluetooth ? to the active speaker. A turntable and CD player are shown connecting via RCA cables to the active speaker. A computer is shown connecting via USB-C ? to the active speaker. An audio interface or mixer is shown connecting via 1/4" TS cables to the active speaker. An AUX cable is shown connecting from a mobile device to the active speaker.

Active Speaker (Left) Front Panel:

1. TWEETER: 3/4-inch silk dome tweeter for soft, precise highs.
2. WOOFER: 3-inch neodymium magnet woofer for balanced mid and low frequencies.
3. LED: Indicates power status, Bluetooth status, and active EQ correction.
4. BASS REFLEX PORT: Specially designed, elongated port to enhance bass response.

Active Speaker (Left) Rear Panel:

5. VOLUME: Adjusts the output volume.
6. BLUETOOTH: Button to turn Bluetooth audio and Mobile AXON STUDIO app connection on/off.
7. USB-C: Connects to a Windows or Mac computer for USB-Audio DAC and AXON STUDIO software access. Can also connect to mobile devices for streaming.
8. 4-PIN CONNECTOR: For connecting to the passive right speaker.
9. DC IN: Power adapter input (24V DC, 2.5A, center-negative).
10. AUX IN: 1/8" stereo input for external audio devices.
11. RCA INPUT: RCA stereo inputs for turntables, CD players, etc.
12. LINE IN: 1/4" inputs for audio interfaces, mixers, etc.
13. POWER BUTTON: Turns the unit on or off.

Passive Speaker (Right) Rear Panel:

14. 4-PIN CONNECTOR: For connecting to the active left speaker.
15. MAGNETIC STAND FOOT: Provides adjustable tilt angles (+9°, -7°) for optimal sound direction and decoupling.
16. 3/8" TRIPOD THREAD: For mounting on a speaker stand.

LED Status Indicators:

LED Color	Status
Green	Normal Power On
Blue	Bluetooth Enabled
Green Blinking	Normal and EQ On
Blue Blinking	Bluetooth On and EQ On
Red	Clipping (Signal Overload)

Installation and Setup

For optimal performance, use high-quality audio cables and place the speakers securely on a stable surface. Allow a break-in period of a few days for optimal sound quality.

Steps:

Step 1: Before connecting, ensure the monitor volume is set to minimum and the ON/OFF switch on the rear is set to OFF.
Step 2: Connect the speakers using the included 4-pin stereo link cable.
Step 3: Connect the included power adapter to the DC IN jack.
Step 4: Connect your audio source to the 1/4" inputs, AUX input, or RCA inputs on the left speaker.
Step 5: Turn on the unit using the switch on the rear of the left speaker and adjust the volume to your environment.
Step 6: Press the BLUETOOTH button to activate wireless music streaming ?. Alternatively, connect the included USB cable to your computer's USB-C port (or use an adapter for iOS devices) for USB-DAC audio streaming, which is recommended.
Step 7: After connecting via USB-C, download the AXON STUDIO software from www.nuxaudio.com for acoustic correction. You can also use the AXON STUDIO app on your iOS or Android device after establishing a Bluetooth connection.
Step 8: Adjust the speaker tilt using the magnetic feet as needed.

Important Note on Power Sequence: Follow the "last on, first off" rule for active speakers. When powering on your system, turn on your mixer/interface and other external devices first, then finally turn on your monitors. When powering off, turn off the monitors first, then the mixer/interface and external devices.

Speaker Placement

For optimal sound performance, place the NUX AXON 3 monitors vertically on a stable surface or stand, ensuring no obstructions between the speakers and your ears. Avoid placement near vibrating objects that can affect sound quality.

Setup Location:

For optimal sound, position the listening spot at the point between the tweeter and woofer at ear level. If the monitors are placed significantly higher or lower, adjust the tilt angle to maintain proper alignment. Use the integrated rubber feet to tilt the speakers upwards when placed below ear level, ensuring accurate sound direction and acoustic decoupling.

Stereo Setup:

For optimal stereo imaging with the NUX AXON 3, position yourself at the apex of an equilateral triangle, with the two monitors placed at the other two points. Ensure symmetry by placing each speaker at an equal distance from side walls, ceiling, and floor to equalize reflections. To achieve clear sound and avoid excessive low-frequency buildup, position the monitors at least 20 cm (8 inches) from walls.

Diagram Description: A diagram illustrates optimal speaker placement for stereo imaging, forming an equilateral triangle with the listener. Another diagram shows a side view of a speaker on a desk, illustrating tilt angles using the magnetic feet. A third diagram shows a top-down view of speaker placement relative to walls, indicating a minimum distance of 20cm from walls.

Room Acoustics and Stand Mounting

Room Acoustics:

Room acoustics are crucial for the optimal performance of your monitors. Even simple acoustic treatments can improve sound accuracy and create a more precise and balanced listening experience. Proper speaker placement combined with room treatment will significantly enhance the clarity and fidelity of your audio system.

Stand Mounting:

The NUX AXON 3 monitor features a 3/8" thread adapter on its underside, allowing it to be mounted on any standard microphone stand for optimal height positioning. This minimizes reflections from desks or shelves, improves frequency response, and provides a more precise listening experience.

AXON STUDIO Software

You can download the AXON STUDIO software from the AXON 3 product page at www.nuxaudio.com. This software allows you to make acoustic adjustments or customize your preferred EQ curve for the AXON 3. Once the download is complete, connect the AXON 3 to your computer via USB cable and open AXON STUDIO to use it.

Software Interface Description: A screenshot of the AXON STUDIO software (PC version) is displayed. It shows a frequency response graph with adjustable EQ bands (HP, LF, LMF, MF, HMF, HF, LP). Below the graph are controls for FREQ (frequency), Q (bandwidth), and GAIN (level) for each EQ band. Icons are present for saving presets, loading presets, and bypassing the EQ.

AXON STUDIO (PC) Interface Elements:

1. ICON: Displays the version of AXON STUDIO and the firmware version of AXON 3.
2. ICON: Indicates whether AXON 3 is successfully communicating with the computer.
3. PRESET-SLOT: Shows the currently selected preset. There are 10 preset slots available: 01-08 are factory presets, 09-10 are empty and customizable. Presets can be selected via a dropdown menu. A '*' symbol indicates unsaved parameter changes.
4. ICON: Press to save the current preset to the active slot.
5. ICON: Press to reset the current preset to default parameters.
6. 'OFF' ICON: Press to enable or bypass the EQ effect in AXON STUDIO. When EQ is active, the LED on the AXON 3 blinks. In bypass mode, the LED is solid, indicating EQ is disabled.
7. 'C' ICON: Press to reset the current preset to default parameters.
8. FREQUENCY RESPONSE: The curve changes in real-time as parameters are adjusted.
9. FILTER BUTTON: Press to enable or bypass the filter.
10. FREQ: Adjusts the frequency of the filter.
11. Q: Adjusts the Q-value (bandwidth) of the filter. A higher Q-value results in a narrower bandwidth, while a lower Q-value results in a wider bandwidth.
12. GAIN: Adjusts the gain of the filter, with a range of ±10 dB.

AXON STUDIO Presets:

No.	Preset	Description
1	Desk 160Hz	This desktop preset for low frequencies attenuates bass frequencies by 4 dB at 160 Hz. This function is designed to compensate for the boost often present in this frequency range when the speaker is placed on a desk, table, or similar reflective surface.
2	Bass Roll-Off	The Bass Roll-Off preset activates a -4 dB filter for bass frequencies (100 Hz). This can compensate for excessively strong bass reproduction, typically caused by placing speakers near room boundaries.
3	Bass Tilt A	The Bass Tilt A preset provides a -4 dB filter for the bass region around 1 kHz, which is usually necessary when speakers are placed near room boundaries.
4	Bass Tilt B	The Bass Tilt B preset provides a -6 dB filter for the bass region around 1 kHz, which is usually necessary when speakers are placed near room boundaries.
5	Treble Tilt A	The Treble Tilt preset attenuates the treble range above 4 kHz by 4 dB, which can be used to dampen a system that sounds too bright.
6	HI-FI	Sets the preset to a more HI-FI sound, tailored to the frequency preferences of the human ear.
7	Film	Using this preset when playing movies results in better sound.
8	Media	This preset emphasizes the vocal range and is therefore ideal for media playback.

APP:

The mobile app offers the same functions as the desktop software. If using a computer is inconvenient, you can enable the Bluetooth function of the AXON 3, pair it with your phone, and use the AXON STUDIO app for settings and control. Search for "AXON STUDIO" in your respective app store to download the app.

Mobile App Screenshot Description: A screenshot of the AXON STUDIO app on a mobile device is shown, displaying EQ controls similar to the desktop version.

Technical Specifications

Type	Specification
Type	2-Way Reference Studio Monitor with Bi-Amp Technology
Crossover Frequency	3kHz
Frequency Response	55Hz - 20kHz (-3dB)
	45Hz - 22kHz (-10dB)
Tweeter	3/4-inch Silk Dome
Woofer	3-inch Neodymium Magnet
Enclosure	Specially designed long-throw bass reflex type
Material	ABS
Max. SPL	107dB
Number of Amps	4
Output Power	Total 45W + 45W (LF 30W, HF 15W)
Input Impedance	10k ohms/-10dBu
Amplifier Type	Class D
Connections	2 x 1/4" TS Input 2 x RCA Input (unbalanced) 1 x 1/8" Stereo AUX Input 4-pin Speaker Connector
Bluetooth	5.0 Compatible with AVRCP Profile V1.6, A2DP Profile V1.3 and HFP Profile V1.7
USB DAC	48kHz, 24-bit
Controls	Volume knob Integrated DSP-EQ for acoustic correction, App/Software controlled
Dimensions	205mm(L) x 94mm(W) x 150mm(H) (each)
Weight	1.98kg

*Technical data and features are subject to change without prior notice.

Frequency Response Graph Description: A graph shows the frequency response of the NUX AXON 3. The X-axis represents frequency in Hz (from 20 Hz to 20 kHz), and the Y-axis represents sound pressure level (dBSPL) from 20 to 100 dB. The curve starts around 40 dB at 20 Hz, rises sharply to around 70 dB by 100 Hz, and then gradually increases to a peak of about 90 dB between 1 kHz and 5 kHz, before slowly declining towards 20 kHz. The curve generally shows a relatively flat response within the audible range, with a slight boost in the mid-high frequencies.

Accessories

User Manual
4-pin Stereo Link Cable
USB-C to USB-A Cable
Power Adapter
NUX Sticker

Troubleshooting

Symptom	Possible Cause	Solution
Power does not turn on / LED does not light up	The power adapter and DC input may not be properly connected. The power switch may not be turned on.	Ensure the power adapter and DC input are securely connected. Turn the power switch ON. If the problem persists, contact your NUX dealer.
No Sound	One or more cables may not be properly connected. The source device may not be outputting an audio signal. The volume may be set too low.	Check if all cables are properly connected. Ensure the source device is functioning correctly and outputting the required signal. Adjust the source device's output level setting, or use the VOLUME knob to increase the output level.
Noisy or distorted sound	One or more cables may be corroded, short-circuited, or otherwise defective. The system may be picking up external noise.	Replace the defective cable(s). Try changing the position or arrangement of cables. Try changing the location of other electrical/electronic devices nearby.

FCC Compliance and Warnings

WARNING