Authorized Dealer. Flipears Questyle M18i | Bluetooth Portable DAC and AmpM18i Pushes the Limit of Ultra-Portable DAC Dongles with Both Bluetooth Capability and Lossless DecodingDual flagship ES9219Q DACsEquipped with Bluetooth 5.43.5mm and 4.4mm outputs for versatile headphone compatibilityUltra-low noise floor of -130dB for a pure background and real soundSupports up to 384kHz (16/24/32-bit) PCM, delivering rich, high-fidelity audioTechnology Without BoundariesThe M18i contains four sets of SiP modules that use Questyle’s patented CurrentMode Amplification, providing both powerful drive and delicate timbre. The M18i also features ESS’s flagship ES9219Q Combo DAC, a dual- DAC mono design, and a TTA (Three-Tier Architecture) DAC framework. Together, these provide performance equivalent to large desktop devices, while raising the bar for portable sound quality.The Questyle M18i features wired USB and dual-mode lossless Bluetooth connectivity, powered by a 16-core XMOS316 USB platform for seamless compatibility with smartphones, PCs, and gaming consoles.As the first M-series product with Qualcomm Snapdragon Sound, the M18i also introduces intelligent battery management, a high-definition OLED screen, and a microphone for clear voice calls. Offering exceptional Hi-Fi audio via Bluetooth or USB, the M18i delivers a premium listening experience.Apple MFi Certified for Guaranteed Performance and CompatbilityThe "i" in M15i indicates that it has been certified by Apple's MFi. MFi certification ensures perfect support for iPhone/iPad and seamless integration into the Apple ecosystem. It complies with Apple's stringent requirements for external devices in terms of power consumption and compatibility, avoiding the risk of damage to phones and systems from arbitrary device pairings.Patented SiP Current Mode AmplifierThe Questyle M18i prioritizes resolving trade-offs between size, power efficiency, and audio performance in portable, battery-powered devices. It features two patented quad-core Current Mode Amplifier (CMA) SiP modules, delivering powerful drive with delicate timbre and achieving ultra-low distortion of 0.0002%.By combining CMA technology with TOREX’s high-efficiency power management, the M18i ensures low power consumption without compromising performance, setting a new benchmark for the Questyle M series.Sound QualityA low noise floor is essential for capturing the intricate details of an audio track, allowing you to experience true high fidelity. The M18i excels in this regard, delivering exceptional accuracy with an ultra-low noise floor of -130dB, as verified in a controlled laboratory testing environment.Full Compatibility for True Lossless EnjoymentThe M18i supports lossless Bluetooth and USB DAC dual-mode switching, making it convenient for users to choose freely. It is equipped with the latest generation of Qualcomm Snapdragon Sound technology and Bluetooth 5.4.3.5mm and 4.4mm Dual Ports with Gain AdjustmentThe M18i, equipped with (x4) current mode engines, supports 3.5mm single-ended and 4.4mm fully balanced output modes. It also features manual gain adjustment, allowing users to choose the gain mode according to personal preferences, headphone characteristics, or the audio system.Management SystemMobile ModeIn Mobile Mode, the USB audio port is used exclusively for data transmission and does not draw power from the connected mobile device. The M18i operates entirely on its internal battery. Similarly, in Bluetooth Mode, the device relies solely on its battery for power, ensuring no external power source is required.PC ModeIn PC Mode, the USB audio port serves a dual purpose: transmitting data and supplying power. It charges the M18i’s battery while simultaneously powering the system.When connected to a USB host device with a current limit, the M18i intelligently manages power distribution. It prioritizes the system’s operation by ensuring stable performance, then dynamically adjusts the battery charging current based on the system’s workload and power availability. This ensures optimal performance without overloading the USB host.SpecificationsAppearanceMaterial: CNC Anodized Aluminum AlloyColor: BlackSize: 75mm x 35mm x 14.5mmBluetoothVersion 5.4Supports: AAC, SBC, aptX, aptXHD, aptX adaptive, LDAC, LE AudioCompatible Operating SystemsAndroid phones and tablets: Android 5.0 and abovePC: Win10 1803 and aboveApple cellphone: iOS (You need to buy an OTG cable for Lightning to USB-C)Apple computer: Mac OSDAC CapabilityPCM: PCM: 44.1kHz-384kHz (16/24/32bit)DSD: DSD64, DSD128, DSD256Output Power4.4mm: 28mW @ 300 ohmsFrequency Response & THDFrequency Response: ±0.1dB (20Hz-20kHz); ±2dB (20Hz-80kHz)THD+N: 0.0002%DAC: (2x) ESS ES9219QIn the BoxM18i Mobile Headphone Amplifier with DACUSB Type-C to Type-C CableUSB Type-C to Type-A CableWarranty CardUser Manual