NUX Flow Tune NTU-3 MKII Mini Pedal Tuner

Introduction

The NUX Flow Tune (NTU-3 MKII) is a compact pedal tuner with advanced functionality. It offers 4 tuning modes (Chromatic/Guitar Standard/Guitar Compensation/Bass). The unique Guitar-Compensation mode provides a more harmonic and delightful sound. It features a high-definition LCD display with 3 display options, A4 calibration, and allows easy toggling between True Bypass, Buffered Bypass, and an innovative Buffered Bypass Monitor mode that keeps the output signal always unmuted.

Product Interface

The pedal features the following interface elements:

• Power Input: Connects to a 9V DC negative tip power supply.
• MODE/A4 Button: Short press to cycle through tuning modes; long press to adjust A4 reference pitch.
• DISPLAY Button: Short press to cycle through display modes; long press to restore factory settings.
• Display: High-definition LCD screen showing tuning status and modes.
• Audio Output: Connects to the next device in the signal chain.
• Footswitch: Activates/deactivates the tuning function.
• TB-BF-BFM Toggle Switch: Selects between True Bypass, Buffered Bypass, and Buffered Bypass Monitor modes.
• Audio Input: Connect your instrument here.

Features

• True Bypass / Buffered Bypass / Buffered Bypass Monitor modes
• A4 calibration (430Hz – 450Hz)
• High-definition LCD display
• 3 display modes
• Unique Guitar-Compensation mode

Operation

Power Input

Connect a 9V DC negative tip power supply (NUX ACD-006A power adapter recommended).

Audio Input

Connect your instrument to the INPUT jack.

Audio Output

Connect the OUTPUT jack to the next device in your signal chain.

Footswitch

Activates/deactivates the tuner pedal.

DISPLAY Button

Short press to switch between 3 Display Modes (a Strobe mode and 2 Arrow modes). Long press to restore factory settings.

MODE/A4 Button

Short press to switch between 4 Tuning Modes (Chromatic, Guitar Standard, Guitar Compensation, Bass). Long press to change the A4 Reference Pitch (430Hz-450Hz).

Bypass Modes

The TB-BF-BFM toggle switch allows selection between three bypass modes:

TB (True Bypass)

When the tuner is bypassed, the pedal has no influence on your output signal. When the tuner is activated and starts tuning, the output will be muted.

BF (Buffered Bypass)

When the tuner is bypassed, the output signal is driven by a Buffered Bypass circuit. When the tuner is activated and starts tuning, the output will be muted.

BFM (Buffered Bypass Monitor)

The signal is driven exactly as in the Buffered Bypass mode, while the output remains unmuted no matter whether the tuner is activated or deactivated.

Display Modes

NUX Flow Tune offers 3 display modes: a Strobe Mode and 2 Arrow Modes. Short press the DISPLAY button to switch among these modes.

Display Mode 1 - Strobe (Default)

Visual description: The display shows a central 'E' with horizontal bars that move to indicate pitch. 'Flat' shows bars moving down, 'In Tune' shows bars stationary, 'Sharp' shows bars moving up. The screen content scrolls down.

Display Mode 2 - Arrow

Visual description: The display shows an 'E' with arrows indicating pitch. 'Flat' shows arrows pointing down, 'In Tune' shows arrows centered, 'Sharp' shows arrows pointing up. The screen content scrolls down.

Display Mode 3 - Arrow

Visual description: Similar to Mode 2, but with different arrow styles and background elements. 'Flat' shows arrows pointing down, 'In Tune' shows arrows centered, 'Sharp' shows arrows pointing up. The screen content scrolls up.

Tuning Modes

Short press the MODE/A4 button to switch between the 4 tuning modes:

1. Chromatic Mode: Default.
2. Guitar Standard Mode: Indicated by highlighted "G STD".
3. Guitar Compensation Mode: Indicated by highlighted "G CPS". Offers a more harmonic and delightful sound.
4. Bass Mode: Indicated by a highlighted letter "B".

Changing the Reference Pitch

You can calibrate the A4 reference pitch to a value from 430Hz to 450Hz. Follow these steps to change the reference pitch:

1. Long press the MODE/A4 button.
2. When the display blinks, short press the MODE/A4 button to change the reference pitch in 1 Hz steps. (e.g. the display shows "40" for 440Hz, "32" for 432Hz).
3. To confirm the currently displayed reference pitch, long press the MODE/A4 button again, or simply do not press any button for 4 seconds.

Instrument Tuning

It is recommended to tune your instrument before playing or practicing. Here are the standard tuning recommendations for guitar and bass. Beginners should follow these standard tunings.

Standard Guitar Tuning

Standard Bass Tuning

Guitar Compensation Tuning

Inspired by James Taylor, this mode offers a more harmonic and delightful sound.

Specifications

• Tuning range: A0 (27.5Hz) - C8 (4186Hz)
• Tuning modes: Chromatic, Guitar Standard, Guitar Compensation, Bass
• Tuning accuracy: ±0.1 Cent
• Input impedance: 10MΩ
• Output impedance: 1kΩ
• Current draw: <100mA
• Dimensions: 97.4mm(L) x 43.5mm(W) x 41.6mm(H)
• Weight: 197.4g

*Specifications are subject to change without notice.

Accessories

• Owner's manual

Safety and Compliance

Important Safety Instructions

WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture.

CAUTION: To reduce the risk of fire or electric shock, do not remove screws. If user-serviced parts are inside, refer servicing to qualified service personnel.

The lightning symbol ⚡ indicates a dangerous voltage. The exclamation point ❗ indicates important safety information.

General Safety Precautions:

• Use only the power supply provided or power cord. If you are not sure of the type of power supplied, consult your dealer or local power company.
• Do not place this apparatus near heat sources, such as radiators, heat registers, or appliances which produce heat.
• Guard against objects or liquids entering the enclosure.
• Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous voltage points or other risks. Refer all servicing to qualified service personnel.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as when the power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally or has been dropped.
• The power supply cord should be unplugged when the unit is to be unused for long periods of time.
• Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles and at the point where they exit from the apparatus.
• Prolonged listening at high volume levels may cause irreparable hearing loss and/or damage. Always be sure to practice "safe listening".

FCC Regulation Warning (for U.S.A.)

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.

RoHS Compliance

The following table indicates the presence of specific hazardous substances in the product, in compliance with GB 28489-2022 standards:

*The information in the table above is based on GB 28489-2022 and applies only when the product contains items with the specified limits.

○ indicates that the content of this hazardous substance in all homogeneous materials of this part is within the limits specified in Chapter 5 of GB 28489-2022.

Environmental Protection

When disposing of this product, please follow local guidelines and do not discard it as household waste to avoid environmental pollution.

Warranty Information (China)

Dear NUX User: When using NUX products, please read the product manual carefully. If you have questions or difficulties, please call the after-sales service hotline: 400-990-9866.

Exchange/Repair Policy

Exchange Policy:

1. For products purchased through authorized channels, if non-human product performance failures occur within 1 month of purchase under normal use, and the product appearance and packaging are intact, you can exchange it at the dealer where it was purchased.

2. When exchanging, consumers must present the purchase receipt issued by the dealer; otherwise, the dealer may refuse the exchange.

Warranty Policy:

1. For products purchased through authorized channels (based on the seller shown on the invoice), if non-human damage performance failures occur within 1 year of purchase, free repair services are provided.

2. For products damaged due to factors exceeding 1 year or due to human or force majeure, paid repair services will be provided.

*This after-sales policy is only applicable to mainland China. For other countries and regions, local after-sales policies and legal regulations apply.