1. Introduction
The Questyle CMA18 Portable is a high-resolution portable DAC and headphone amplifier designed to deliver exceptional audio performance for smartphones, PCs, and laptops. It integrates advanced audio technologies to provide a desktop-grade listening experience in a compact form factor. This manual provides detailed instructions for the proper use, setup, and maintenance of your CMA18 Portable.
2. Contenu de la boîte
Veuillez vérifier que tous les articles sont présents dans le colis :
- Casque portable Questyle CMA18 Amplifier
- Câble USB-C vers USB-C
- Câble USB-C vers Lightning
- Adaptateur USB-C vers USB-A
- Manuel de l'utilisateur (ce document)
3. Produit terminéview
The CMA18 Portable features a robust design with sandblasted aviation-grade aluminum surfaces, silver high-gloss buttons, and custom Corning glass panels. Its internal amber-colored LEDs illuminate the circuitry, highlighting the device's sophisticated engineering.
Figure 3.1 : Face et dos view of the Questyle CMA18 Portable, showcasing its transparent glass panel revealing internal components.
Equipped with the latest XMOS XU316 platform and AK4493 DAC chip, the CMA18 Portable supports high-resolution audio up to PCM768/DSD512. It incorporates four sets of self-developed current-mode PCT patented SiP chips (CC630/CA630) for optimal thrust and low power consumption.
Figure 3.2: The CMA18 Portable connected to a smartphone, demonstrating its use as an external audio device.
The device offers both 3.5mm and 4.4mm headphone outputs and features high/low gain mode switching to accommodate various headphones and in-ear monitors (IEMs).
Figure 3.3: The CMA18 Portable connected to in-ear monitors, highlighting its compatibility with different audio devices.
Caractéristiques du produit :
- Portable Size, Desktop Performance: Designed for high-fidelity audio on the go.
- Advanced DAC Chip: XMOS XU316 USB chip and AK4493 DAC support PCM768/DSD512.
- Current-Mode Amplification : Four sets of patented SiP chips (CC630/CA630) for powerful and efficient audio output.
- High-Resolution Wireless: Supports aptX HD and LDAC Bluetooth codecs for optimal wireless sound quality.
- Analog Input Recording: Features 3.5mm (AUX IN) and 4.4mm (BAL IN) inputs for external audio equipment, capable of lossless analog-to-digital conversion.
Vidéo 3.1 : Un overview of the Questyle CMA18 Portable Headphone DAC Ampamplificateur, montreasing its design, features, and connectivity options.
4. Installation
4.1 Charge initiale
Before first use, fully charge the CMA18 Portable. Connect the device to a 5V/2A USB power adapter (not included) using the provided USB-C cable. The charging indicator LEDs will show the battery status.
4.2 Connexion aux appareils
- Pour smartphones/tablettes : Use the appropriate USB-C to USB-C or USB-C to Lightning cable to connect your device to the CMA18 Portable's USB DAC IN port. Ensure your smartphone supports USB audio output.
- Pour PC/ordinateurs portables : Connect the CMA18 Portable to your computer's USB port using the provided USB-C to USB-A cable or USB-C to USB-C cable. Install any necessary drivers if prompted by your operating system (typically plug-and-play for most modern OS).
- For Analog Sources: Use a 3.5mm or 4.4mm audio cable to connect your analog audio source (e.g., turntable, pre-amp) to the corresponding AUX IN or BAL IN port on the CMA18 Portable.
5. Mode d'emploi
5.1 Mise sous/hors tension
Press and hold the Power button on the side of the device for approximately 3 seconds to power on or power off the CMA18 Portable.
5.2 Sélection d'entrée
Press the Function button to cycle through the available input modes: USB, Optical (OPT IN), Bluetooth (BLUETOOTH), 3.5mm Analog Input (AUX IN), and 4.4mm Balanced Analog Input (BAL IN). The corresponding indicator LED will light up.
5.3 Réglages de gain
The CMA18 Portable features a gain switch (HIGH/STD) to optimize output for different headphones. Use the 'HIGH' setting for high-impedance or less sensitive headphones, and 'STD' (Standard) for sensitive IEMs or low-impedance headphones. Adjust based on your headphone's requirements and desired volume level.
5.4 Contrôle du volume
Use the '+' and '-' buttons on the side of the device to adjust the output volume. Adjust the volume gradually to prevent sudden loud sounds.
5.5 Couplage Bluetooth
- Passez en mode Bluetooth.
- The Bluetooth indicator LED will blink, indicating pairing mode.
- On your source device (smartphone, tablet), search for Bluetooth devices and select "Questyle CMA18 Portable" to pair.
- Once paired, the Bluetooth indicator LED will remain solid.
5.6 Analog Input Recording Function
The CMA18 Portable can function as an external, lossless, high-performance Analog-to-Digital Converter (ADC) for its 3.5mm (AUX IN) and 4.4mm (BAL IN) inputs. Connect your analog source to the desired input. When connected to a computer via USB, the CMA18 Portable will appear as an audio input device, allowing you to record the analog signal. You can simultaneously monitor the input via the 3.5mm or 4.4mm headphone outputs.
6. Entretien
6.1 Nettoyage
Wipe the device with a soft, dry, lint-free cloth. Do not use abrasive cleaners, solvents, or chemical sprays. Avoid getting moisture into any openings.
6.2 Entretien de la batterie
To prolong battery life, avoid fully discharging the battery frequently. If storing the device for an extended period, charge it to approximately 50% before storage. Recharge every few months to prevent deep discharge.
7. Dépannage
| Problème | Cause possible | Solution |
|---|---|---|
| Pas de sortie audio | Incorrect input selected; Volume too low; Headphones not connected properly; Source device issue. | Verify input mode; Increase volume; Ensure headphones are fully plugged in; Check audio settings on source device. |
| L'appairage Bluetooth échoue | Device not in pairing mode; Source device too far; Interference. | Ensure CMA18 is in Bluetooth pairing mode (blinking LED); Move source device closer; Restart both devices. |
| Sound distortion or noise | Gain setting too high for sensitive headphones; Poor cable connection; Source audio quality. | Switch to 'STD' gain mode; Check and re-seat all cables; Use high-quality audio files. |
| Device not recognized by PC/Laptop | Incorrect USB cable; Driver issue; USB port issue. | Ensure data-capable USB cable is used; Try a different USB port; Check device manager for driver status. |
| La batterie se décharge rapidement | High volume usage; Old battery; Background processes. | Reduce volume; Ensure device is powered off when not in use; Contact support if battery life significantly degrades. |
8. Spécifications
| Fonctionnalité | Détail |
|---|---|
| Nom du modèle | CMA18 Portable |
| Prise pour casque | 3.5 mm et 4.4 mm |
| Technologie de connectivité | Wireless, Wired (Bluetooth, USB, Optical, Analog) |
| Technologie de communication sans fil | Bluetooth 5.0 (aptX HD, LDAC) |
| Frequency Range (PCM) | Jusqu'à 768 kHz |
| Max Output Power (BAL) | 1000 mW à 32 Ω |
| THD+N | <0.0003%@20mW, 300Ω |
| Rapport signal sur bruit | >120 dB |
| Autonomie de la batterie | >10 XNUMX heures |
| Temps de charge | 3.5 heures |
| Dimensions du produit | 4.33 x 2.75 x 0.59 pouces |
| Poids de l'article | 1.23 livres |
| Matériel | Aluminium |
| Fabricant | Questyle |
9. Garantie et assistance
The Questyle CMA18 Portable comes with a standard manufacturer's warranty. For detailed warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official Questyle webConsultez le site. Conservez votre preuve d'achat pour toute réclamation au titre de la garantie.