QLS MUB1 Portable DAC / AMP

MUB1 Portable HiFi USB and Bluetooth DAC & Headphone Amp Battery local pure power supply | 1100mW/ch high output power Optional Super-high gain | NDCS shielding | Wurth inductor Panasonic electrolytic capacitor | Femtosecond crystal | BUF634*4 output Music listening, enjoyable and practical. Listening impressions from Clark: MUB1’s general sound design is consistent with QA361 and QA390LE. With high sound density and a strong sense of structure, this music is warm, sensitive, steady, and long-lasting to listen to. It has excellent hierarchical details and vertical spatial feeling. The PCB area and power supply of MUB1’s DAC&headphone amplifier section are greater than those of QA361 since it lacks a player part. MUB1 is an inch long and an inch strong, and it has a few advantages over QA361 in terms of sound quality. These advantages include a larger sound field, a more complete sound structure, a sound that is softer and more durable to listen to, greater sound dynamics, and more solid mid- to low-frequency reproduction. How could such lovely and sweet music not make you feel something? Therefore, I believe that each enthusiast needs at least one MUB1. Main design highlights 1100mW@32 Ω high power, more leisurely Super-High Gain 4-speed gain selection CS43131*4 better sound quality BUF634*4 Amps big lineup 2500mAH, pure and abundant local power supply Stable and non-interference NDCS shielding design Wurth inductor with a spacious and full sound Panasonic electrolytic capacitor with a good music atmosphere Selected femtosecond crystal oscillator with nominal jitter of 150fs Four level independent HiFi architecture Powerful power supply system with 14 independent power sources 24Bit / 96kHz high-definition Bluetooth/tr> Bluetooth specially optimized for abundant sound information PCM 32Bit / 384kHz DSD256 UAC1.0 mode Lower distortion 0.0001%/tr> Signal to noise ratio 132dB Dynamic range 132dB Noise almost “0” 4.4mm, 3.5mm headphone output & line output SPDIF optical & coaxial output Pentaconn 4.4 headphone socket Separation of charging and data (external power supply accessible) Start with the car ignition in CAR mode Multi-platform compatibility 6-layer circuit board for digital analog separation Note: A patent application of FiiO has been submitted for the CAR mode, and FiiO has permission to utilize the CAR mode of this product. Five major application scenarios 24Bit 96K high-definition Bluetooth Receive mobile streaming input without bundling for convenient and good enough sound Mobile phone connection DAC&Headphone amplifier Pure and abundant local battery power supply No anxiety of phone battery with excellent sound Office desktop PC-HiFi Desktop small DAC and Headphone amplifier all-in-one machine Act discrete enough without discrete voice Car HiFi audio source Coaxial / optical input to DSP, or AUX to host CAR mode with good sound, more convenient Home speaker system Expand high sound quality mobile streaming input function Simple enough, practical enough, and good sound enough Three keys to good sound in MUB1 2.75 times the power of QA361 dual high mode Sufficient power margin The sound is more easy and adaptable MUB1 balance port output power up to 1100mW/ch It is much greater than the output power of many flagship players Put fine timber to petty use Super-Hign gain is 3-4 times voltage amplification with high gain Modern machines pursue testing parameters The sound gets more flat and ordinary as the gain drops MUB1 returns to traditional old machines with over 10 times voltage amplification Outstanding musical taste causes listeners to unconsciously dance to the music Realistic visuals set to vibrant, exuberant music that seems just out of reach HiFi performance needs to be ensured by the materials used Use desktop HiFi materials Make MUB1 sound more like a real HiFi device Audio electrolytic capacitors are rarely used in portable goods. Panasonic electrolytic capacitor with rare sound dense sense of space The BUF634 provides a more scaled sound Low internal resistance Wurth inductor with stable and atmospheric sound Sound created by power supply Design of a power supply that is broadband, low noise, high transient, and low in internal resistance Up to 14 power sources provide independent power supply for each circuit part, ensuring purity and stability This battery cable is combination of HiFi wires using different materials, resulting in a noble sound. Analog power supply voltage of up to 16V at Super-high gain, with sound more open. Design of a low noise power supply with analog and digital separation, achieving seamless sound Oscillator is the soul of sound MUB1 selected femtosecond crystal oscillator High precision, with a nominal jitter of only 150fs Good crystal oscillator with stable sound Measurement based on APX555 audio analyzer Sound quality on Bluetooth is already adequate Bluetooth 5.0, CSR 8675 optimization module with good sound Supports 24Bit/96kHz high-definition Bluetooth Specially optimized Bluetooth overall design The information content and sound density are already very close to USB connections NDCS dead corner free circuit shielding technology Stable connection without interference, pleasant to listen to, and better to use USB DAC&Headphone amp with full platform support Support 32Bit / 384kHz, DSD256 Android, iPhone, and tablet ready to use Local batteries are pure and plentiful. the sound quality is higher ASIO driver, compact PC HiFi all-in-one machine for Windows desktop Act discrete enough without discrete voice UAC2.0, Linux, MacOS drive free, The USB OTG output of HiFi player can also be used Support UAC1.0 CAR mode that simplifies car audio upgrades MUB1 has optical and coaxial outputs, and Line out can also be set One line connection to the car audio DSP is sufficient, simple and convenient Connect to the host Aux in through level setting Aux out Both Apple and Android phones can increase the volume on the phones, making it more convenient In CAR mode, following USB power to automatically switch on and off, more worry free Four Cirrus Logic flagship DAC chips Start liking Cirrus Logic DAC due to the good sound quality of CS4398 It has the uncommon natural, enjoyable, and smooth sound of a contemporary DAC The new generation CS43198 and 43131 have better designs The sound is more precise and realistic thanks to the special NOS option. Using 4 CS43131, eight channel DAC designed as two channels Each four channel DAC is for providing more detailed and louder sound MUB1 overall distortion is better than the theoretical value of DAC chips Flagship level dynamics Compared to the USD $2000 flagship HiFi player, it is not inferior Measurement based on APX555 audio analyzer Almost “zero” noise MUB1, whether single ended or balanced, the medium and low gain noise <2uVrms 50% of 4uVrms noise at low gain only for QA361 The signal-to-noise ratio is as high as 132dB High sensitivity headphones also struggle to hear background noise Key Interface Description A Display area B Power button: Long press to turn on/off, short press to turn off/wake up the display screen C Volume : Short press to increase the volume by 1, long press to continuously increase the volume by 1 D Volume -: Short press to decrease the volume by 1, long press to continuously decrease the volume by 1 E setting key (M): Short press to enter the setting interface, long press to pause/play, short press to connect/hang up when calling, long press to reject F Previous track (↑): Switch to playing the previous track and adjust the parameters upwards when setting the interface G Next track (↓): Switch to playing the next track; Adjust parameters downwards when setting the interface H Digital audio output port: 3.5 optical and 3.5 coaxial (pin definition is shown in the figure below) I Type-C charging or external power input port J Type-C audio OTG input port K Microphone pickup hole L 4.4 balanced headphone port, also used as a balanced LO port M 3.5 single ended headphone port, doubles as LO/AUX output port Description of 3.5 coaxial line foot position                                                 Signal / Signal                 GND / Signal – Product parameters Item / model Balance port Single port Body size 96*65*14.5mm  (L * W * H) Host weight 142g Input interface Type-C USB data, Type-C USB power supply&charging, wireless Bluetooth Bluetooth format Bluetooth 5.0, LDAC, APTX, APTX-HD, ACC, SBC USB protocol UAC2.0 protocol / UAC1.0 protocol, supporting Windows, Mac, Android, iOS systems USB port DSD sampling rate 2.8224MHz (DSD64), 5.6448MHz (DSD128), 11.2896MHz (DSD256), Native or DoP USB port PCM sampling rate 16Bit ~ 32Bit, 44.1kHz ~ 384kHz Output interface 3.5 single ended & 4.4 balanced headphones (can be set to Line out/Aux out), 3.5 optical or coaxial SPDIF digital output Optical/ coaxial output 16Bit ~ 24Bit, 44.1kHz ~ 192kHz PCM, DoP64 DAC chip CS43131 * 4 pieces, QFN large package OP Selected 2 OP* pieces with excellent texture and musical appeal Headphone amplifier chip BUF634A * 4 Gain control Low / Mid / High / Super-High Volume control This device has a volume level of 100, which can be independently adjusted from the phone volume Frequency response 20Hz ~ 20kHz  ±0.5db THD N  (AES17 (20kHz), A-weighted, unloaded, medium gain) 0.0001% 0.00015% SINAD (AES17 (20kHz), unweighted, unloaded, medium gain) 120db 116db SNR  (A-weighted, medium gain) 132db 126db Dynamic range  (A-weighted, medium gain) 132db 124db Crosstalk (unloaded, medium gain) -140db -137db Crosstalk (32Ω, medium gain) -95db -73db Output power (THD N<0.01%, S-gain) 1100mW 1100mW @32Ω 410mW 410mW @32Ω 250mW 250mW @300Ω 65mW 65mW @300Ω Noise floor (A-weighted) 1.2uVrms @G = L 1.8uVrms @G = L 1.2uVrms @G = M 1.8uVrms @G = M 2.5uVrms @G = H 2.5uVrms @G = H 8.3uVrms @G = S 5.8uVrms @G = S Reference: High sensitivity headphones are also difficult to hear to the noise floor. When QA361 has low gain, the noise floor is 4uV. Battery life 8~10 hours Charging time 2~3 hours Charger Type-C charger (user provided), DC 5V, ≥2A External power input Input from charging port Type-C, DC 5V, ≥2A Microphone function Support Bluetooth calls with built-in omnidirectional microphone Note: The above audio parameter measurements are based on the APX555 audio analyzer, with the internal battery fully charged and F0 filtering mode, tested in the qianlongsheng Laboratory environment.