1. Уводзіны і большview
The Questyle M18i is a high-resolution portable USB DAC and headphone amplifier designed to enhance your audio experience across various devices. Featuring Bluetooth 5.4 connectivity, dual 4.4mm balanced and 3.5mm unbalanced outputs, and support for advanced codecs like LDAC, it delivers lossless audio quality for smartphones, PCs, and laptops. Its compact design integrates cutting-edge technology, including the ESS ES9219Q DAC chip and Questyle's patented Current Mode Amplifier SiP modules, ensuring exceptional sound performance with ultra-low distortion.

Figure 1.1: Questyle M18i Headphone Ampзадымнік
2. Асноўныя магчымасці
- Advanced DAC Performance: Equipped with the latest ESS flagship ES9219Q DAC chip, utilizing Questyle and ESS's collaborative TTA DAC framework for optimal performance.
- Бягучы рэжым Ampвызваленне: Features two patented quad-core Current Mode Amplifier SiP modules, providing powerful drive, delicate timbre, and an ultra-low distortion record of 0.0002%.
- Versatile Outputs and Controls: Offers both 3.5mm unbalanced and 4.4mm balanced outputs. Includes manual gain control for various headphones and an MFB button for Bluetooth functions. Volume buttons provide 60 levels of loudness.
- Seamless Bluetooth and USB DAC Modes: Supports seamless switching between lossless Bluetooth and USB DAC modes.
- Qualcomm Snapdragon Sound Technology: Integrates Qualcomm's latest Snapdragon Sound technology with Bluetooth 5.4, supporting AAC, SBC, aptX, aptX HD, aptX Adaptive, LE AUDIO, and 24bit/96kHz LDAC for wireless lossless audio.
- Палепшаная якасць званкоў: Incorporates Qualcomm's cVc Generation 8.0 call solution with ClearVoice Capture technology and an Infineon flagship microphone for crystal-clear voice calls with noise suppression.
3. Змесціва ўпакоўкі
Калі ласка, пераканайцеся, што ўсе прадметы прысутнічаюць у пасылцы:
- Questyle M18i Headphone Ampзадымнік
- Кабель USB-C да USB-C
4. Схема і кампаненты прадукту
Familiarize yourself with the various parts and connections of your M18i device.

Figure 4.1: M18i Internal Components and PCB Layout
Асноўныя кампаненты ўключаюць:
- 1. Patented SP Current Mode Ampмодуль Lifier: ЗША 9,614,483 B2
- 2. ESS Flagship USB DAC: ES9219Q x 2
- 3. 4.4mm balanced headphone jack
- 4. Torex power management system
- 5. Asynchronous Clock Patented Architecture
- 6. Порт для зарадкі USB Type-C
- 7. Infineon's flagship microphone
- 8. USB Type-C Data Port
- 9. Раз'ём для навушнікаў 3.5 мм
- 10. Gain/MFB button: (Multi-function button only for BT Mode)
- 11. Bluetooth & PC/Phone Mode Switch
- 12. XMOS USB DAC
- Кантролер MCU
- Qualcomm Bluetooth Module
- OLED-дысплей

Figure 4.2: 4.4mm and 3.5mm Dual Outputs
5. Настройка
5.1 Першапачатковая зарадка
Before first use, fully charge your M18i. Connect the provided USB-C cable to the M18i's USB Type-C Charging Port and the other end to a compatible USB power source (e.g., computer USB port, wall adapter). The charging time is approximately 2 hours.
5.2 Падключэнне навушнікаў
The M18i features both 3.5mm unbalanced and 4.4mm balanced headphone jacks. Insert your headphone cable into the appropriate jack. Ensure the connection is secure.
5.3 Падключэнне прылады
The M18i supports connection to various systems including Android, iOS, Windows, and Mac devices. Use the appropriate USB-C cable to connect the M18i to your smartphone, PC, tablet, or laptop.

Figure 5.1: M18i Compatibility with Various Platforms
6. Інструкцыя па эксплуатацыі
6.1 Mode Selection (Bluetooth / PC / Phone)
Use the dedicated switch on the M18i to select between Bluetooth, PC, or Phone mode.
6.1.1 Phone Mode
In Phone Mode, the M18i operates using its internal battery for power. The USB audio port is solely for data transfer and does not draw or supply power to the connected phone.

Figure 6.1: M18i in Phone Mode
6.1.2 Рэжым Bluetooth
In Bluetooth Mode, the M18i also relies exclusively on its battery for power supply. To pair, switch to Bluetooth mode, then search for 'Questyle M18i' on your device's Bluetooth settings and connect.

Figure 6.2: M18i in Bluetooth Mode
6.1.3 Рэжым ПК
In PC Mode, the M18i's USB audio port can transfer data and supply power to charge the battery or provide power to the system. When connected to a phone in PC mode, the M18i will consume the phone's battery power.

Figure 6.3: M18i in PC Mode
6.2 Пераключальнік узмацнення
In Phone or PC mode, press the "GAIN/MFB" button to switch between HIGH/LOW gain settings. This allows you to match the impedance of different headphones for optimal audio output.

Figure 6.4: Gain Switch Location
6.3 MFB Button (Multi-Function Button)
The MFB multi-function button is only operable in Bluetooth mode.
- Прайграванне музыкі: During playback in Bluetooth connected state, click the "MFB" button once to toggle between Pause and Play. Click it twice to skip to the next track.
- Кіраванне званкамі: When a call comes in while playing in Bluetooth connected state, click the "MFB" button once to answer the call. Click it twice to reject the call. During an active call, click it once to end the call.

Figure 6.5: MFB Button Location
6.4 Рэгулятар гучнасці
Use the dedicated volume buttons (+ and -) on the M18i to adjust the loudness. The device provides 60 levels of volume control.
7. Тэхнічнае абслугоўванне
To ensure the longevity and optimal performance of your Questyle M18i, follow these maintenance guidelines:
- Уборка: Use a soft, dry, lint-free cloth to clean the exterior of the device. Avoid using harsh chemicals, cleaning solvents, or strong detergents, as they may damage the finish or internal components.
- захоўванне: When not in use, store the M18i in a cool, dry place, away from direct sunlight, extreme temperatures, and high humidity.
- Апрацоўка: Асцярожна звяртайцеся з прыладай. Пазбягайце падзення або моцных удараў, якія могуць пашкодзіць унутраную электроніку.
- Падлучэння Парты: Keep the headphone jacks and USB-C ports free from dust and debris. You may use a can of compressed air to gently clear any obstructions.
- Зарадка: Always use the provided cable or a high-quality, compatible USB-C cable for charging to prevent potential damage to the battery or charging port.
8. Выпраўленне непаладак
If you encounter issues with your M18i, please refer to the following common problems and solutions:
| праблема | Магчымая прычына | Рашэнне |
|---|---|---|
| Няма выхаду гуку | Incorrect mode selected; Loose headphone connection; Low device volume; Device not powered on. | Ensure correct mode (Phone/PC/Bluetooth) is selected. Check headphone connection. Increase volume on M18i and source device. Power on the M18i. |
| Праблемы з падключэннем Bluetooth | M18i not in pairing mode; Interference; Previously paired device interfering. | Ensure M18i is in Bluetooth mode and discoverable. Move closer to the source device. Turn off Bluetooth on other nearby devices. Try forgetting and re-pairing the M18i on your source device. |
| Дрэнная якасць гуку (скажэнні, нізкая гучнасць) | Incorrect gain setting; Low quality audio source; Damaged cable/headphones. | Adjust the gain setting (HIGH/LOW) to match your headphones. Ensure you are playing high-quality audio files. Test with different headphones or cables. |
| Кароткі тэрмін службы батарэі | High volume usage; Bluetooth mode (higher power consumption); Old battery. | Reduce volume. Consider using PC mode for extended listening as it can draw power from the host. Ensure the device is fully charged before use. |
| Прылада не зараджаецца | Faulty cable/charger; Dirty charging port. | Try a different USB-C cable and power adapter. Clean the USB-C charging port gently. |
If the problem persists after trying these solutions, please contact Questyle customer support for further assistance.
9. Тэхнічныя характарыстыкі
| Спецыфікацыя | Каштоўнасць |
|---|---|
| Назва мадэлі | M18i |
| Марка | Квестыль |
| Тэхналогія падлучэння | Bluetooth, USB |
| Тэхналогія бесправадной сувязі | Bluetooth 5.4 |
| Гняздо для навушнікаў | 3.5 mm Jack, 4.4 mm Balanced |
| Сумяшчальныя прылады | Cellphones, Smartphone, Various systems including Android, iOS, Windows, Mac, and devices like phones, computers, tablets, laptops, audio players, and car audio systems. |
| Матэрыял | Алюміній |
| Вага прадмета | 0.14 кілаграма (прыблізна 5 унцый) |
| Метад кантролю | Кнопка |
| Час зарадкі | 2 гадзін |
| Імпеданс | 300 Ом |
| Чып ЦАП | ESS ES9219Q x 2 |
| Падтрымліваюцца аўдыякодэкі | AAC, SBC, aptX, aptX HD, aptX Adaptive, LE AUDIO, LDAC |
| Max Resolution (USB DAC) | PCM 384kHz/DSD256 |
| Мікрафон | Infineon flagship microphone with cVc Generation 8.0 |
10. Гарантыя і падтрымка
The Questyle M18i is sold by Questyle, ensuring direct support from the manufacturer. For specific warranty details, please refer to the warranty card included with your product or visit the official Questyle website. For technical support, troubleshooting assistance beyond this manual, or service inquiries, please contact Questyle customer support through their official channels.
Questyle Official Webсайт: www.questyle.com
Калі ласка, захавайце доказы пакупкі для прэтэнзій па гарантыі.





