VOX AP3HG
VOX amPlug 3 High Gain Headphone Guitar Amplifier Instruction Manual
Model: AP3HG
Introduction
Thank you for purchasing the VOX amPlug 3 High Gain Headphone Guitar Amplifier. This compact and portable device allows you to enjoy high-quality guitar tones and practice silently using headphones. Designed for electric guitars, it features multiple amplifier modes, built-in effects, and rhythm patterns to enhance your playing experience.

Image: Front view of the amPlug 3 High Gain unit.
Package Contents
- VOX amPlug 3 High Gain Headphone Guitar Amplifier
- 2 x AAA batteries
- Instruction Manual (this document)
Key Features
- High-Gain Tones: Delivers searing, overdriven tones suitable for heavy rock and metal genres.
- Three Dynamic Modes: Includes High Gain for intense distortion, Mid Boost for added punch, and Gain Boost for even more overdrive.
- Nine Rhythm Patterns: Features selectable rhythm patterns including metal, hard rock, and punk, ideal for practice and jamming.
- Advanced Analog Circuitry: Captures the aggressive sound and fast response characteristic of high-gain amplifiers.
- Compact and Portable: Ultra-lightweight design (40 grams excluding batteries) for easy transport.
- Long Battery Life: Operates on two AAA batteries, providing up to 17 hours of continuous playtime.
- Auxiliary Input: Allows connection of external audio sources to play along with your favorite tracks.
- Foldable Plug Mechanism: Rotates 180 degrees for optimal positioning and convenient storage.
- Auto Power-Off: Conserves battery life by automatically shutting down when not in use.
Controls and Functions

Image: Top view of the amPlug 3 High Gain showing the control knobs and FX button.
- 1. GAIN Knob: Adjusts the amount of distortion or overdrive. Turn clockwise for more gain, counter-clockwise for less.
- 2. TONE Knob: Controls the tonal characteristics, from brighter (clockwise) to warmer (counter-clockwise).
- 3. VOLUME Knob: Sets the overall output volume to your headphones.
- 4. FX Button: Cycles through built-in effects (Chorus, Delay, Reverb) and rhythm patterns. Press briefly to change.
- 5. AUX Input (3.5mm jack): Connect an external audio player (e.g., smartphone, MP3 player) to play along with music.
- 6. Headphone Output (3.5mm jack): Connect your headphones here.
- 7. Guitar Input (1/4-inch plug): Plugs directly into your electric guitar's output jack. This plug rotates 180 degrees.
- 8. Power Button: Press and hold to turn the unit on or off.
Setup Guide
- Insert Batteries:
Open the battery compartment cover on the back of the amPlug unit. Insert two AAA batteries, ensuring correct polarity (+/-). Close the cover securely.

Image: Battery compartment with AAA batteries.
- Connect to Guitar:
Plug the 1/4-inch jack of the amPlug 3 directly into your electric guitar's output jack. The plug can rotate 180 degrees to accommodate various guitar body shapes and playing positions.

Image: amPlug 3 connected to a guitar.
- Connect Headphones:
Plug your headphones into the 3.5mm headphone output jack on the amPlug 3 unit.

Image: Headphones being plugged into the amPlug 3.
Operating Instructions
Power On/Off
Press and hold the Power button (located on the side) for approximately 1 second to turn the amPlug 3 on or off. A small LED indicator will illuminate when the unit is powered on.
Adjusting Tone and Volume
Use the GAIN, TONE, and VOLUME knobs on the top of the unit to adjust your desired sound. Experiment with different settings to find your preferred tone.

Image: Adjusting the amPlug 3 controls.
Selecting Effects and Rhythms
Press the FX button (small button on the top right) to cycle through the available effects (Chorus, Delay, Reverb) and rhythm patterns. Each press will advance to the next option. Refer to the detailed product specifications for a full list of available effects and rhythms.
Using the AUX Input
Connect an external audio device to the AUX input jack using a 3.5mm stereo cable. You can then play along with your favorite music or backing tracks through your headphones. The volume of the external audio can be controlled by your external device.
Maintenance
Battery Replacement
When the sound becomes distorted or the LED indicator dims, it is time to replace the batteries. Open the battery compartment on the back of the unit and replace the two AAA batteries with new ones, observing correct polarity. Always use fresh batteries for optimal performance.
Cleaning
Wipe the unit with a soft, dry cloth. Do not use abrasive cleaners, waxes, or solvents as these may damage the finish.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from headphones. |
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| Sound is distorted or weak. |
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| Unit turns off unexpectedly. |
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Specifications
| Model Number | AP3HG |
| Dimensions (L x W x H) | 1.42"D x 5.12"W x 7.2"H (approx. 36 x 130 x 183 mm) |
| Weight | 2.12 ounces (approx. 60 grams) excluding batteries |
| Power Supply | 2 x AAA batteries |
| Battery Life | Up to 17 hours (approximate, may vary with usage) |
| Input/Output Jacks | 1/4" Guitar Input, 3.5mm Headphone Output, 3.5mm AUX Input |
| Effects | Chorus, Delay, Reverb |
| Rhythm Patterns | 9 patterns (Metal, Hard Rock, Punk, etc.) |
| Material | Plastic |
Important Safety Information
- Do not expose the unit to rain, moisture, or extreme temperatures.
- Avoid dropping or subjecting the unit to strong impacts.
- Do not attempt to disassemble or modify the unit.
- Remove batteries if the unit will not be used for an extended period.
- Dispose of batteries according to local regulations.
- Prolonged listening at high volume levels may cause hearing damage.
Warranty and Support
For warranty information and customer support, please refer to the official VOX website or contact your local VOX distributor. Keep your purchase receipt as proof of purchase for warranty claims.
Manufacturer: VOX
Website: www.voxamps.com
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