1. Introduction
Thank you for choosing the KZ AS24 Pro In-Ear Monitor Headphones. This manual provides detailed instructions for the proper setup, operation, and maintenance of your new audio device. Please read this manual thoroughly before use to ensure optimal performance and longevity of your earphones.

Image 1.1: KZ AS24 Pro In-Ear Monitor Headphones, showcasing the earphones, detachable cable, and the in-line tuning switch.
Product Features
- 12 Balanced Armature Drivers: Each earphone is equipped with 12 balanced armature drivers for precise sound reproduction across frequencies.
- High-Precision 3D Printing Technology: Utilizes DLP 3D printing for accurate acoustic structural design, optimizing sound transmission.
- High-Purity Silver-Plated Cable: Dual parallel design cable for improved audio signal transmission and durability.
- 4-Position Tuning Switch: Allows for precise adjustment of different frequency bands to customize sound.
- Extraordinary Noise Isolation: In-ear design effectively isolates external noise for an immersive listening experience.
- Ergonomic Design: Contoured housing for a comfortable and secure fit.
2. Package Contents
Please verify that all items are present in the package:
- KZ AS24 Pro In-Ear Monitor Headphones (1 pair)
- Detachable Silver-Plated Cable with Microphone (1 unit)
- Ear Tips (various sizes)
3. Setup and Wearing
3.1 Connecting the Cable
- Identify the left (L) and right (R) earpieces and the corresponding connectors on the cable. The cable connectors are 0.75mm gold-plated.
- Align the cable connector with the socket on the earpiece. Ensure the pins are correctly oriented.
- Gently push the cable connector into the earpiece socket until it is securely seated. Do not force the connection.
- Repeat for the other earpiece.
3.2 Selecting and Installing Ear Tips
Proper ear tip selection is crucial for sound quality and comfort. Experiment with the included ear tips to find the best fit for your ears. The earphones come with memory foam ear tips for enhanced comfort and isolation.
- Gently remove the pre-installed ear tips by twisting and pulling.
- Select an ear tip size that creates a good seal in your ear canal without causing discomfort.
- Push the new ear tip onto the nozzle of the earpiece until it is firmly attached.
3.3 Wearing the Earphones
The KZ AS24 Pro earphones are designed for an over-ear fit, which provides better stability and reduces cable noise.
- Identify the left (L) and right (R) earpieces.
- Place the earpiece into your ear canal.
- Loop the cable over the top of your ear, guiding it downwards behind your ear.
- Adjust the earpiece and cable until you achieve a comfortable and secure fit with a good seal.

Image 3.1: Proper wearing of the KZ AS24 Pro earphones, highlighting the ergonomic design and over-ear cable routing.
4. Operation
4.1 Using the 4-Position Tuning Switch
The KZ AS24 Pro Tuning Version features a 4-position tuning switch on each earpiece, allowing you to customize the sound signature. Each switch position affects specific frequency bands.

Image 4.1: Illustration of the 4-position tuning switch and its impact on the earphone's frequency response curve.
Refer to the diagram above for the specific effects of each switch. Generally:
- Switch 1: Adjusts low frequency response (e.g., 1 level up or 2 levels up).
- Switch 2: Often works in conjunction with Switch 1 for low frequency adjustments.
- Switch 3: Adjusts ultra-high frequency response (e.g., 1 level reduced).
- Switch 4: Often works in conjunction with Switch 3 for ultra-high frequency adjustments (e.g., 2 levels reduced).
Experiment with different switch combinations to find your preferred sound profile. Use a small tool (like a SIM ejector pin or a toothpick) to carefully adjust the switches.
4.2 Using the In-line Microphone and Control
The included cable features an in-line microphone and a push-button control for convenient use with compatible devices.
- Single Press: Play/Pause music, Answer/End calls.
- Double Press: Skip to next track (music playback).
- Triple Press: Skip to previous track (music playback).
5. Maintenance and Care
5.1 Cleaning the Earphones
- Regularly clean the ear tips with a soft, damp cloth. Ensure they are completely dry before reattaching.
- Gently wipe the earpiece housing with a dry, soft cloth to remove any dirt or earwax.
- Do not use harsh chemicals, solvents, or abrasive cleaners.
5.2 Cable Care
- Avoid sharp bends or excessive pulling on the cable.
- When storing, coil the cable loosely to prevent tangling and damage.
- Always hold the plug, not the cable, when disconnecting from a device.
5.3 Storage
When not in use, store your earphones in a clean, dry place, preferably in a protective case, to prevent dust accumulation and physical damage.
6. Troubleshooting
- No Sound:
- Ensure the 3.5mm plug is fully inserted into your audio device.
- Check the volume level on your audio device.
- Verify that the cable is securely connected to both earpieces.
- Test with another audio source or device.
- Poor Sound Quality / Imbalance:
- Ensure ear tips are properly seated and form a good seal in your ear canal.
- Check for debris in the earphone nozzles.
- Verify the tuning switches are set identically on both earpieces, unless intentional.
- Microphone Not Working:
- Ensure the 3.5mm plug is fully inserted into a compatible device.
- Check your device's audio input settings.
7. Specifications
| Feature | Specification |
|---|
| Product Model | KZ AS24 Pro |
| Driver Configuration | 12 Balanced Armature Drivers per side |
| Frequency Response | 20-40000Hz |
| Impedance (Tuning Version) | 20-50Ω |
| Sensitivity (Tuning Version) | 109-114dB±3dB |
| Cable Type | High-purity Silver-Plated Cable |
| Pin Type | 0.75mm |
| Cable Length | 120±5cm |
| Plug Type | 3.5mm |
| Noise Control | Sound Isolation |
| Material | Metal, Plastic (Resin Housing) |
| Item Weight | 100 Grams (approx. 3.53 ounces) |
| Control Method | Push Button |
8. Safety Information
- Hearing Protection: Avoid listening at high volume levels for extended periods to prevent hearing damage.
- Environmental Awareness: Do not use earphones in situations where inability to hear ambient sounds could be dangerous (e.g., driving, cycling, walking in traffic).
- Choking Hazard: Keep small parts, such as ear tips, away from children and pets.
- Proper Disposal: Dispose of the product and its components responsibly according to local regulations.
9. Warranty and Support
Specific warranty details and customer support contact information are not provided within this manual. Please refer to the product packaging, your purchase receipt, or the retailer's website for warranty claims and support inquiries.