What is the Questyle M18i Portable Bluetooth DAC Amp?
The Questyle M18i is a premium, high-resolution portable Bluetooth DAC and headphone amplifier designed to transform your smartphone into an audiophile-grade media station. Engineered with precise craftsmanship and housed in a sleek CNC anodized aluminum alloy chassis, the M18i delivers ultra-pure, lossless audio whether you are commuting, traveling, or relaxing at home. Fully compatible with both iOS and Android devices, it is the ultimate Hi-Fi dongle upgrade for demanding music lovers.
Key Features & Sonic Performance
Dual ES9219Q High-Resolution DAC Architecture
At the core of the Questyle M18i are twin flagship ES9219Q DAC chips working in parallel. This dual-mono configuration guarantees exceptional channel separation, an expansive soundstage, and ultra-low harmonic distortion (0.0002%), ensuring every detail in your lossless tracks is faithfully rendered.
Lossless Bluetooth 5.4 & Advanced Codec Support
Cut the cord without sacrificing fidelity. Powered by modern Bluetooth® 5.4, the M18i supports top-tier wireless codecs including LDAC, aptX Adaptive, aptX HD, AAC, and LE Audio. Experience high-definition wireless playback with stable transmission and virtually non-existent latency.
Versatile 3.5mm & 4.4mm Balanced Outputs
Designed to drive everything from sensitive in-ear monitors (IEMs) to demanding full-sized headphones, the Questyle M18i features both standard 3.5mm single-ended and heavy-duty 4.4mm balanced headphone outputs, delivering up to 28mW @ 300Ω on balanced connection.
Technical Specifications
| DAC Chipset | Dual ESS ES9219Q (ES9219Q ×2) |
|---|---|
| Chassis Material | CNC Anodized Aluminum Alloy |
| Bluetooth Version | Bluetooth® 5.4 |
| Supported Codecs | LDAC, aptX Adaptive, aptX HD, aptX, AAC, SBC, LE Audio |
| Audio Decoding Support | PCM: 16/24/32-Bit, 44.1kHz – 384kHz DSD: Native DSD64, DSD128, DSD256 |
| Output Power | 28mW @ 300Ω (4.4mm Balanced Output) |
| Frequency Response | 20Hz – 20,000Hz (±0.1dB) 20Hz – 80,000Hz (±2dB) |
| Total Harmonic Distortion (THD+N) | 0.0002% |
| Input Interface | USB Type-C |
| Output Interfaces | 3.5mm Single-Ended | 4.4mm Balanced |
| Dimensions | 75 × 35 × 14.5 mm |
Why Choose the Questyle M18i?
- Universal Compatibility: Plug-and-play functionality for iPhone, iPad, Android smartphones, laptops, and tablets.
- Compact & Ultra-Portable: Fits easily in your pocket or bag for high-resolution sound anywhere.
- Audiophile Power & Dynamic Range: Unlocks hidden detail in your favorite audio streaming services (Tidal, Apple Music, Qobuz).
