Nobsound Q4 Mini Ddigital to Analog Converter Bluetooth Receiver S/PDIF USB Gaming DAC COAX / OPT Headphone Amp 24Bit/192K

The latest version upgraded in Nov. 2023, make big progress in its components, wiring and circuit to greatly improve the sound with lower distortion and higher S/N ratio (up to 113dB).
Features
The latest Q4 Bluetooth receiver & D/A converter: with Bluetooth / PC-USB / U-disk / Optical and Coaxial S/PDIF inputs can match perfectly with most home audio system; transmits stream bit-perfect 24Bit/192KHz HD low jitter signal, with output protect circuit, safe for your expensive audio system.
PC-USB / U-disk inputs and dual analog outputs: besides PC-USB (support phone OTG), also with U-disk input to play lossless audio format, easy to set-up, no need for any driver or software, truly plug-and-play. RCA output can be connected to amplifier or powered speakers, and headphone amp circuit is added to drive most 16-300Ω headphones.
HiFi clear sound with tone control: adopts high-end chip combination to get high-quality sound with higher S/N ratio and lower distortion (0.005%). Also with treble and bass knobs, can be used as preamp to adjust one’s own preferable sound styles, presents HiFi music with rousing highs and deep lows.
Practical funtions to simplify use: with full-function remote control, all settings can be achieved from the distance; with coding input selection button and independent input indicators, clearly to show the working status in real time; aluminum alloy case with unique mirror design looks very cool, both provide HiFi music and decorate your desktop audio space.
Comparision between Nobsound Q4 and Other Similar DAC

Warm tips:
1. U-disk input is prior to Bluetooth input, if you want Bluetooth input please make sure the U-disk is plugged out.
2. Bluetooh of Q4 can only be searched and connected when input channel is switched to Bluetooth input mode.
3. PC-USB input also supports mobile phones that with OTG functions, but Android system needs OTG cable and IOS system needs camera kit, please prepare by yourself.
Parameters
Audio input: Bluetooth 5.0/USB/Coaxial/Fiber Optical
Audio output: stereo L/R RCA / 3.5mm headphone jack
Input sampling rate supported:
PC-USB: 96K/24Bit
Fiber/Coaxial: 192K/24Bit
U-disk supported formats: MP3/WMA/APE/WAV/FLAC
U-disk max capacity: 64G
Treble & bass range: ±6dB
Frequency response: 20Hz-20KHz (±0.5dB)
PC-USB support operating system: XP/W7/W8/W10/MAC/linux
Distortion: 0.0057%
SNR: ≥ 113dB
Amp output max power: 110mW @32Ω
Headphone matched impedance: 16-300Ω
RCA output level: 1.9V
Working voltage: DC 5V (type-C)
Dimensions(W*D*H): 95*78*32mm / 3.74*3.07*1.26in
Net weight: 235g / 0.52lb
Package weight: 500g / 1.10lb
Packing List
1 × Q4 DAC
1 × Remote Control (without 2*AAA batteries)
1 × USB Power Cable
1 × USB Data Cable
1 × Optical Cable
1 × Bluetooth Antenna
1 × User Manual