FiiO QX11 Portable DAC and Headphone Amplifier - Dark Green

The FiiO QX11 is a pocket-sized USB DAC and headphone amplifier that turns a phone, tablet, laptop or games console into a serious listening source. Plug a pair of in-ear monitors or full-size headphones into its 3.5mm or 4.4mm balanced output and it delivers up to 800mW per channel in Desktop Mode, enough for the vast majority of headphones, while a dedicated Gaming mode with microphone support makes it equally at home as a PC sound card. It is the newest member of FiiO's QX series, sitting below the QX13 and inheriting the architecture of the KA17 with further refinements to sound quality, power efficiency and usability.

Dual ESS DACs and a Texas Instruments Amplifier Stage

Decoding is handled by two flagship ESS ES9069Q DAC chips built on the fourth-generation 32-bit HyperStream architecture, working in a fully differential arrangement that lowers internal digital noise for an exceptionally quiet background. USB audio is managed by a RISC-V dual-core SPV5068 audio processor, chosen for low latency, broad compatibility and a typical decoding power draw of around 150mW. The analogue stage is Texas Instruments throughout: two OPA1692 op-amps handle voltage gain and four OPA1622 op-amps in parallel drive the headphone outputs, giving low noise, low distortion and plenty of current. The digital and analogue boards are kept separate under a shielding cover to prevent crosstalk, and a four-stage power supply with independently partitioned, low-noise LDO regulators feeds the digital and analogue sections separately.

Desktop Mode and Dual USB-C Ports

The QX11 has two USB-C ports: one for data and charging from the source device, and a dedicated, orange-marked POWER IN port. Connect a power adapter or a portable power source such as FiiO's ESTICK to the second port and flick the slide switch to enable Desktop Mode, which raises balanced output to 800mW + 800mW into 32 ohms. Without external power the balanced output still manages 360mW + 360mW, with 175mW + 175mW available from the 3.5mm socket. The POWER IN port also supports up to 45W USB Power Delivery pass-through, so a compatible phone or player can charge while you listen. The 3.5mm socket doubles as a coaxial digital output at up to 384kHz/24-bit.

HiFi and Gaming Modes

Two operating modes are built in. HiFi mode supports PCM up to 768kHz/32-bit and native DSD512. Gaming mode runs at 48kHz for low latency and broad compatibility, and adds four tuned sound profiles for FPS, action, MOBA and music games that bring out in-game cues such as footsteps. A built-in microphone with AI ENC environmental noise cancellation, plus support for 3.5mm CTIA in-line headset microphones, keeps calls and team voice chat clear.

Display, Knob and Controls

A 1.14-inch colour LCD (135 x 240) shows sample rate, format, gain, filter, volume and EQ status at a glance, with landscape and portrait themes and screen rotation to suit how you hold it. Volume is set by a knurled, double-sided 3D-engraved encoder knob that also acts as a confirm button, and a customisable Fn shortcut button handles single, double and long presses for functions such as EQ, mode and theme switching or track skipping. Firmware updates are applied over USB.

Auto EQ and App Control

Auto EQ on the FIIO app and web platform applies a correction profile matched to your headphones at a single tap. The app also offers multiple preset sound profiles and a 10-band parametric EQ, working at up to PCM 384kHz/24-bit, alongside gain, filter and other settings. The two-tone aluminium alloy body uses a gradient finish with a patterned surface, weighs about 36g and measures roughly 64 x 28.8 x 13mm. A protective case, USB-C to USB-C cable, quick start guide and warranty card are included.