JOYO JA-02 II Mini Guitar Amplifier

Owner's Manual

I. Warning

Thank you for purchasing JOYO products. Please read this manual carefully before operating.

Don't disassemble or repair this product by yourself.
Don't use or store it near any heat sources, damp and dusty areas. Avoid violent vibration or shock.
Don't drop this product, otherwise it may malfunction.
Don't use alcohol or other cleaning fluids to clean this product.
Please turn off the unit when it's not in use.
If the unit shuts down automatically during use, it means the battery runs out, please charge it in time.
Don't turn up the VOLUME too much suddenly while using the headphones, otherwise it may damage the headphones or impair your hearing.
Please keep it away from places that have iron filings, so as to prevent iron filings from being attracted by the speaker and thus affecting the sound quality.

II. Panel Description

Front Panel:

1. Bluetooth Status Indicator: Indicates Bluetooth connection status.
2. Bluetooth Switch: Turns Bluetooth function on/off.
3. Bluetooth/AUX Volume Knob: Adjusts volume for Bluetooth and AUX input.
4. Guitar Volume/Power Switch Knob: Turns the unit on/off and adjusts guitar volume.
5. Power Indicator: Red light indicates the unit is on.
6. Guitar Tone Control Knob: Adjusts the tone of the guitar signal.
7. Guitar Sound Selection Switch (CLEAN/OVERDRIVE): Selects between clean and overdrive tones.
8. Guitar Gain Control Knob: Adjusts the gain of the guitar signal.
9. Guitar Input Jack: Connect your guitar here.
10. AUX IN Jack: Connect external audio sources here.
11. Headphone Output Jack: Connect headphones for silent practice.
12. USB Type-C Charging Port: For charging the internal battery.

III. How to Use JA-02 II

Turn on the unit by turning the VOLUME knob. The power indicator will turn red.
Connect your guitar to the INPUT Jack. Use the CLEAN/OVERDRIVE switch to select your desired tone. Adjust the GAIN, TONE, and VOLUME knobs for fine-tuning.
The JA-02 II features built-in Bluetooth 5.0. To use this feature:
- Press the Bluetooth switch to turn on Bluetooth. The Bluetooth indicator will light up.
- On your portable device, enable Bluetooth, find "JA-02 II" in the device list, and pair. The Bluetooth indicator will remain solid blue when successfully paired.
You can also play music by connecting an external audio source via the AUX IN Jack. Connect headphones to the Headphone Jack for silent practice.
Charging the Unit:
- The JA-02 II has a built-in lithium battery. Use the included USB Type-C charging cable to charge it.
- If the battery is low, the unit will shut down automatically. Charge it promptly to avoid irreversible damage to battery capacity.
- The power indicator shows charging status only when the unit is turned off. It is red during normal use.
- When turned off and charging, the power indicator is yellow. It turns off when fully charged.

Note: The package includes one USB Type-C charging cable. You can use any 5V charger with a rated output current of 1A or higher (most smartphone chargers meet this requirement).

Note: Do not dismantle the unit as it contains a built-in lithium battery.

IV. Parameters

Power: 5V DC, 1A (Battery: 3.7V lithium polymer battery 2000mAh)
Output: 5W
Input Impedance: Guitar Input: 1MΩ; Auxiliary Input: 10kΩ
Speaker Impedance: 4Ω
Dimensions: 147 (L) × 75 (W) × 96 (H) mm
Weight: 330g

V. Package Contents

JA-02 II Unit × 1
Owner's Manual × 1
USB Type-C Charger Cable × 1

JOYO Product Service Policy

I. Warranty Service: In case of performance failure due to non-human damage during normal product use, consumers are entitled to warranty service for 12 months from the date of purchase.

II. Warranty Exclusions: Warranty rights are not applicable under the following circumstances:

Human-induced damage.
Exceeding the warranty period.
Absence of a warranty card and valid invoice, unless proof of purchase within the warranty period is provided.
Warranty card does not match the product model, or the warranty card has been altered.
Product damage caused by failure to use, maintain, or service the product as per the instructions.
Unauthorized disassembly, repair, water damage, or drop damage by the user.
Damage caused by force majeure.

III. JOYO Service Information:

Consumer Service Hotline: 0755-29765390
For more information, please visit: www.joyochina.cn

Manufacturer Information

Brand: JOYO
Product Name: Mini Guitar Amplifier
Manufacturer: Shenzhen JOYO Technology Co., Ltd.
Address: 2/F, Lushi Industry Building, 28th District, Bao'an, Shenzhen, 518133 China.
After-sales Service Hotline: 0755-29765390
Website: www.joyoaudio.com
Email: info@joyoaudio.com
Tel: 0086-755-29765381
Execution Standard: QB/T 4326-2012

Product Qualification Certificate

Inspection Conclusion: Qualified

Inspector No.: QC 01

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