Introduction
The ATK Horizon Gaming In-ear Earphones are designed for both Hi-Fi audio enthusiasts and competitive gamers, offering precise sound positioning and high-fidelity audio. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your earphones to ensure the best possible experience.

Safety Information
Please read and follow these safety guidelines to prevent damage to the product or injury to yourself:
- Avoid prolonged listening at high volumes to prevent hearing damage.
- Do not use the earphones in situations where you need to hear your surroundings (e.g., driving, cycling).
- Keep the earphones away from water and moisture.
- Do not attempt to disassemble or modify the earphones. This will void the warranty.
- Keep out of reach of children.
Package Contents
Verify that all items are present in your package:
- ATK Horizon In-ear Earphones (Left and Right units)
- Detachable 0.78-2Pin Cable (Type-C or 3.5mm, depending on model)
- Silicone Ear Tips (S, M, L sizes)
- User Manual (this document and a PDF version)
- Carrying Pouch (may vary by package)

Setup
1. Ear Tip Installation
Select the ear tips that provide the best seal and comfort for your ears. Gently push the ear tip onto the nozzle of the earphone until it is securely attached.

2. Cable Installation
The ATK Horizon earphones feature a detachable 0.78-2Pin cable. Ensure correct orientation when connecting the cable to the earphone units.
- Identify the Left (L) and Right (R) earphone units.
- Identify the Left and Right connectors on the cable. The cable typically has color indicators: a blue circle for the left ear cable and a red circle for the right ear cable.
- Align the pins on the cable connector with the sockets on the earphone unit. Gently push until it clicks into place. Do not force the connection.

3. Wearing the Earphones
Insert the earphones into your ears, ensuring a snug and comfortable fit. The cable should typically loop over your ear for stability.

4. Connecting to Audio Source
- For 3.5mm Jack: Plug the 3.5mm connector into your device's headphone jack.
- For Type-C Connector: Plug the USB Type-C connector into your device's Type-C port.
Operating Instructions
Inline Control (Type-C Version)
The Type-C version of the ATK Horizon earphones features a three-button inline control with an integrated AI noise-canceling microphone.

- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
- Pause/Play: Press the center button.
- Answer/End Call: Press the center button during a call.
AI Noise-Canceling Microphone
The integrated microphone provides clear communication by actively canceling environmental noise, ensuring your voice is heard without distortion or static.
DSP Adjustments (Type-C Version)
The Type-C version includes a built-in high-spec 384 kHz/32-bit DAC chip and supports full DSP adjustments via the ATK HUB software. This allows for visual tuning of frequency bands, Q factor, and gain. You can also share custom EQ presets to the cloud.


Key Features
- Next-generation Composite Dynamic Driver: 10mm dynamic driver with PU + PEEK composite surround for powerful sound, balanced rigidity and flexibility, responsive performance, punchy bass, precise positional audio, and smooth highs with low distortion.
- Rear Chamber Design: Unique acoustic design enhances low-frequency diffusion and reduces standing waves, minimizing bass muddiness and masking effects for tight, controlled bass and crystal-clear in-game audio.
- Precision CNC-machined Faceplate: Crafted from CNC-machined aluminum alloy, featuring elegant curves.
- Dual Magnetic Circuit Design: Features dual neodymium magnets that optimize magnetic flux density, delivering performance for high-demand scenarios.
- Esports-level Sound Positioning: Designed to help users catch subtle footsteps and gunshots with powerful yet non-piercing audio.
- HiFi-level DAC (Type-C version): High-performance 384kHz/32-bit DAC chip for superior audio quality.
- OFC Four-strand Braided Cable: Standard 0.78-2Pin high-purity oxygen-free copper cable with four independently braided strands to reduce electromagnetic interference. Soft and flexible material for comfortable wear.
- High-quality Brass Nozzle: Reduces unwanted resonance to deliver rich, well-defined mids with enhanced imaging and precise spatial positioning.






Specifications
| Feature | ATK Horizon (Type-C) | ATK Horizon (3.5mm) |
|---|---|---|
| Name | ATK Horizon Series Gaming In-ear Earphones | |
| Color | Gunmetal Grey / White | |
| Connector | Type-C | 3.5mm |
| DSP | Yes (integrated Sound Card) | N/A |
| Driver | ATK HUB 3.0 Dual-driver (10mm PU+PEEK composite surround DLC-like diaphragm unit) | |
| Other Functions | EQ, Sensitivity Adjustment for Microphone | N/A |
| Impedance | 16Ω±15% (@1kHz) | |
| Sensitivity | 110±3dB/Vrm(@1kHz) | |
| Microphone | AI Noise-Canceling Microphone | |
| Earphone Cable | 0.78-2Pin | |
| Connection Mode | Wired | |
| Cable Length | 1.2m | |
| Cable Specification | Four-Strand Braided High-Purity Oxygen-Free Copper | |
| Material | Metal (Faceplate) | |
| Headphone Pads Material | Silicone | |
| Frequency Response Range | 20 - 40Hz | |
| Plug Type | Line Type | |
| Certification | CE, FCC, RoHS | |

Maintenance
- Cleaning: Regularly clean the ear tips with a soft, damp cloth. Ensure they are completely dry before reattaching. Use a dry, soft cloth to wipe the earphone bodies and cable.
- Storage: When not in use, store the earphones in the provided carrying pouch to protect them from dust and damage.
- Cable Care: Avoid sharp bends or excessive pulling on the cable to prevent internal damage.
- Temperature: Do not expose the earphones to extreme temperatures or direct sunlight for extended periods.
Troubleshooting
| Problem | Possible Solution |
|---|---|
| No sound or sound from only one side |
|
| Crackling or distorted sound (Type-C version) |
|
| Microphone not working |
|
| Uncomfortable fit |
|
User Tips
- For gaming, especially FPS games, the precise sound positioning of these earphones can be a significant advantage.
- If you experience crackling with the Type-C version, consider trying the 3.5mm version if compatibility is an option for your device.
- Experiment with the ATK HUB software (for Type-C models) to customize EQ settings and optimize sound for different games or music genres.
- Ensure the earphones are properly sealed in your ear for optimal bass response and noise isolation.
Warranty & Support
For detailed warranty information and customer support, please refer to the official ATK GEAR website or the full user manual PDF.
Official User Manual (PDF): For more in-depth instructions and detailed diagrams, you can view the official user manual PDF here.
If you encounter any issues not covered in this manual, please contact ATK GEAR customer service for assistance.