Introduction
The JCALLY JM25 is a portable digital audio decoding amplifier designed to enhance your mobile audio experience. This adapter converts a Type-C digital audio output to a 3.5mm analog output, allowing you to connect traditional headphones and audio devices to modern smartphones, tablets, and computers. Featuring a high-performance ES9318C DAC chip and supporting high-resolution audio formats like PCM 32bit/384kHz and DSD256, the JM25 delivers lossless sound quality in a compact and durable design.
Key Features
- Flagship Dual Chips: Equipped with ESS ES9318C main DAC chip and SAVITECH SA9312L main control chip for superior audio processing.
- High-Resolution Audio Support: Supports PCM up to 32bit/384kHz and DSD64, DSD128, DSD256 (Native) for exceptional sound clarity.
- Lossless Sound Quality: Designed to provide high-fidelity, lossless audio decoding.
- Wide Compatibility: Connects Type-C devices (phones, computers, tablets) to 3.5mm audio devices (earphones, headphones, audio systems, car audio).
- Durable Construction: Features an aluminum alloy die-cast curved shell with anodized spray 180 mesh fine sand craft for resistance to wear and scratches.
- Premium Cable: Utilizes an 8-core Kirin weaving cable (blue mix silver) to enhance timbre brightness and reproduce natural sound.
- Robust Connectors: TID certificated Type-C plug ensures a tight connection, and a contact-making 3.5mm female connector increases plug lifetime.
- Portable Design: Small size and light weight (approx. 6g) make it easy to carry.
Specifications
| Attribute | Value |
|---|---|
| Brand | JCALLY |
| Product Name | JM25 audio adapter |
| DAC Chip | ES9318C |
| USB Main Control Chip | SAVITECH SA9312L |
| PCM Support | 32bit 384kHz |
| DSD (Native) Support | DSD64, DSD128, DSD256 |
| Signal To Noise Ratio (SNR) | 115dB |
| THD+N | -110dB |
| Crosstalk Suppression | -110dB |
| Output Voltage | 35.15mW@16Ω, 1.2mW@600Ω |
| Dynamic Frequency | 115dB |
| Distortion | -100dB |
| Frequency Response (FR) | 20Hz-20KHz |
| Output Thrust | Dynamic Adaptive 16Ω~600Ω |
| Length | 110mm ±10mm |
| Weight | 6g ±0.5g |
| Color | Blue (cable) |
| Built-in Battery | No |
| WIFI | No |
| Bluetooth | No |
Setup Guide
The JM25 is designed for plug-and-play functionality. Follow these steps to connect your device:
- Identify Ports: Locate the Type-C port on your source device (smartphone, tablet, computer) and the 3.5mm audio jack on your headphones or audio system.
- Connect to Source: Insert the Type-C connector of the JM25 adapter firmly into the Type-C port of your source device.
- Connect Audio Output: Plug your 3.5mm headphones or audio cable into the 3.5mm female connector of the JM25 adapter.
- Verify Connection: Ensure both connections are secure. Your device should automatically recognize the JM25 as an audio output device.
Operating Instructions
Once connected, the JM25 functions as an external sound card, processing digital audio from your source device and outputting it as high-fidelity analog sound to your connected 3.5mm audio device.
- Volume Control: Adjust the volume directly from your source device (phone, computer, etc.). The JM25 does not have independent volume controls.
- Audio Playback: Start playing audio from your preferred music player or streaming service on your source device. The sound will be routed through the JM25 to your connected headphones or speakers.
- High-Resolution Audio: For optimal performance with high-resolution audio files (PCM 32bit/384kHz, DSD256), ensure your source device and audio player software support these formats.
Care and Maintenance
- Cleaning: Use a soft, dry cloth to clean the adapter. Avoid using liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place when not in use. Avoid extreme temperatures.
- Handling: Handle the adapter by its connectors, not by the cable, to prevent damage to the wiring. Avoid excessive bending or twisting of the cable.
- Protection: The aluminum alloy shell provides good durability, but avoid dropping the device or subjecting it to strong impacts.
Troubleshooting
- No Sound Output:
- Ensure the JM25 is fully inserted into the Type-C port of your source device.
- Verify that your headphones/speakers are correctly plugged into the 3.5mm jack of the JM25.
- Check the volume level on your source device and ensure it's not muted.
- Test with different headphones or a different source device to isolate the issue.
- Some Android devices may require enabling "OTG" or "USB Audio" in settings.
- Poor Sound Quality/Distortion:
- Ensure the audio file or streaming quality is high.
- Check for loose connections at both ends of the adapter.
- Avoid using the adapter in environments with strong electromagnetic interference.
- Ensure your source device's audio drivers are up to date (especially for computers).
- Adapter Not Recognized:
- Try unplugging and re-plugging the adapter.
- Restart your source device.
- Ensure your source device's Type-C port supports audio output (not all Type-C ports do).
- Test the adapter on another compatible device if possible.
User Tips
- For the best audio experience, use high-quality audio files and headphones.
- Keep the adapter clean and free from dust to maintain optimal connection quality.
- When connecting to a computer, ensure the audio output device is set to the JM25 (or recognized USB audio device) in your sound settings.
- Some devices might require a few seconds to recognize the adapter upon initial connection.
Warranty and Support
For warranty information, technical support, or service inquiries, please contact the manufacturer or your point of purchase. Keep your proof of purchase for any warranty claims.
