1. Introduction
Thank you for choosing the KZ AS24 Pro In-Ear Monitor Headphones. These high-fidelity earphones are engineered for exceptional audio performance, featuring 12 balanced armature drivers per side, advanced 3D printing technology, and a high-purity silver-plated cable. This manual provides essential information for proper setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device.

Image 1.1: KZ AS24 Pro In-Ear Monitor Headphones with detachable cable.
2. Package Contents
Please verify that all items are present in your package:
- KZ AS24 Pro In-Ear Monitor Headphones (Left and Right earpieces)
- High-purity Silver-plated Cable (3.5mm plug, 0.75mm pin type)
- Assorted Ear Tips (various sizes)
- User Manual (this document)
3. Product Overview
The KZ AS24 Pro is designed for superior audio reproduction and comfort. Key features include:
- 12 Balanced Armature Drivers: Each earpiece houses 12 precisely distributed balanced armature drivers for detailed sound across the frequency spectrum.
- High-Precision 3D Printing: The internal acoustic structure is crafted using DLP 3D printing technology for optimal sound transmission.
- Detachable Silver-plated Cable: Ensures excellent signal conductivity and durability.
- Ergonomic Design: Contoured housing for a comfortable and secure fit, providing effective noise isolation.
- Four-Stage Tuning Switch: Allows for precise adjustment of different frequency bands to customize the sound profile (available on specific versions).

Image 3.1: Exploded view showing internal components including 12 balanced armature drivers, 3D-printed cavity, four-stage tuning switch, and 0.75mm gold-plated socket.

Image 3.2: Close-up of the individual balanced armature drivers used in the AS24 Pro.

Image 3.3: Transparent resin housing, showcasing the precision 3D printing technology.
4. Setup
4.1 Attaching the Cable
- Identify the left (L) and right (R) earpieces and the corresponding markings on the cable connectors.
- Align the 0.75mm pins on the cable with the sockets on the earpieces.
- Gently push the connectors firmly into the earpieces until they are securely seated. Do not force them.
4.2 Selecting Ear Tips
Proper ear tip selection is crucial for sound quality and comfort. Experiment with the included ear tips to find the size that provides a snug fit and good seal in your ear canal. A good seal enhances bass response and noise isolation.
4.3 Wearing the Earphones
- Insert the earpieces into your ear canals.
- Route the cable over the top of your ear, ensuring it sits comfortably and securely. The pre-formed ear hooks on the cable help maintain stability.
- Adjust the earpieces for a comfortable and secure fit that provides optimal sound isolation.

Image 4.1: Proper wearing of the KZ AS24 Pro earphones for ergonomic fit and sound isolation.
5. Operating Instructions
5.1 Connecting to an Audio Source
Plug the 3.5mm jack of the cable into the headphone output of your audio device (e.g., smartphone, digital audio player, computer, audio interface).
5.2 Using the Tuning Switches (for Tunable Versions)
The KZ AS24 Pro features a four-position tuning switch on each earpiece, allowing you to adjust the sound signature. Use a small tool (e.g., a SIM ejector tool or a toothpick) to carefully toggle the switches. Refer to the diagram below for common tuning configurations. Note that the 'Standard Version' of this product includes these tuning switches.

Image 5.1: Frequency response graph illustrating the effects of the four-position tuning switches on different frequency bands.
- Switch 1: Adjusts low frequency (1 level).
- Switch 1+2: Adjusts low frequency (2 levels).
- Switch 3: Adjusts ultra-high frequency (1 level reduction).
- Switch 3+4: Adjusts ultra-high frequency (2 levels reduction).
Note: Actual sound changes may vary slightly depending on the specific listening environment and audio source.
6. Maintenance and Care
6.1 Cleaning
- Regularly clean the earpieces and ear tips with a soft, dry, lint-free cloth.
- Remove ear tips and clean any earwax or debris from the nozzle mesh using a small brush or cleaning tool.
- Do not use harsh chemicals, solvents, or abrasive cleaners.
6.2 Cable Care
- Avoid sharp bends or excessive pulling on the cable.
- When storing, coil the cable loosely to prevent tangling and damage.
- The detachable design allows for easy replacement if the cable becomes damaged.
6.3 Storage
Store your earphones in a clean, dry place, preferably in a protective case, when not in use to prevent dust accumulation and physical damage.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or low volume |
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| Distorted sound |
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| Poor noise isolation |
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| Cable connection issues |
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8. Specifications
| Feature | Detail |
|---|---|
| Product Model | KZ AS24 Pro |
| Driver Configuration | 12 Balanced Armature Drivers per side |
| Cable Type | High-purity Silver-Plated Cable, Detachable |
| Pin Type | 0.75mm |
| Cable Length | 120 ± 5cm |
| Plug Type | 3.5mm |
| Frequency Response | 20-40000Hz |
| Impedance (Standard Version) | 29Ω |
| Sensitivity (Standard Version) | 109dB ± 3dB |
| Noise Control | Sound Isolation |
| Material | Plastic (Resin Housing) |
| Item Weight | 100 Grams (approx. 3.53 ounces) |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided at the point of purchase or contact your retailer. Keep your proof of purchase for warranty claims.