QXD1, Entry Level Fully Balanced DAC
2. THD+N: <0.00015% （-116dB）
3. Dynamic Range: < -124dB
4. SABRE32 Reference DAC
5. Multi-core RISC Architecture XMOS
6. 7 Filter Modes Switching
1. Toslink input indicator(TOS) | 2. Coaxial input indicator(COAX) |
3. USB-B input indicator | 4. Power / Mute(Flash) indicator |
5. Audio inputs switching button | 6. Volume down button |
7. Volume up button | 8. Mute button |
1. XLR output: 4.0Vrms @0dBFS | 2. RCA output: 2.0Vrms @0dBFS |
3. Coaxial input: 24-bit / 192kHz | 4. Coaxial output: 24-bit / 192kHz |
5. USB-B input: 32-bit / 768kHz PCM / DSD512(Native) | 6. Toslink input: 24-bit / 192kHzv |
7. Power in: USB-C | |
QXD1-THD+N XLR.JPG
QXD1-THD+N RCA.JPG
QXD1-DNR.JPG
QXD1-LA-IMD Sweep.jpg
QXD1-Frequency Response.JPG
QXD1-SNR.JPG
QXD1-NOISE.JPG
Dimensions | 149.3mm(W) * 87mm(D) * 37mm(H) | |
Net Weight | 475 g | |
Power Input | DC 5V ⎓ 1A | |
Power Consumption | < 4W | |
Signal Input | USB-B / Optical / Coaxial | |
Digital Output | Coaxial | |
Line Out | XLR / RCA | |
RCA | Coaxial input | |
Analog Output | XLR | RCA |
THD+N @1kHz | < 0.00015% | < 0.00015% |
Frequency Response@20Hz ~ 20kHz | ± 0.18dB | ± 0.18dB |
Dynamic Range | < -124dB A-Wt | < -124dB A-Wt |
Crosstalk @1kHz | < -130dB | < -130dB |
Output Voltage | 4.0Vrms | 2.0Vrms |
Output Impedance | 200Ω | 100Ω |
Noise Floor Modulation | 4.3μVrms | 5.0μVrms |
Q1: Can the USB-C port be used for power input and signal input simultaneously?
A1: No. It can only be used for power supply.
Q2: Can I use a computer's built-in USB port to power the QXD1?
A2: It is not recommended to use a standard PC USB port for power. Typical PC USB ports provide 500mA, which is insufficient for normal operation of the QXD1 (requires DC: 5V @ 1A).
Q3: Why is there no sound when using Optical input and Coaxial output?
A3: Because only USB to Coaxial output is effective.
Q4: What is recommended to power the QXD1?
A4: A linear power supply is recommended. We recommend the SONCOZ LPI.
Q5: How to put the QXD1 into standby/sleep mode?
A5: The QXD1 is plug-and-play and does not have a sleep/standby mode. It can be muted.
Q6: How to switch filter modes?
A6: Long press the mute button for 2 seconds to cycle through filter modes. The TOS/COAX/USB LEDs will display the current mode in combination. Refer to the QXD1 DAC Filter Mode Setting Truth Table.
Q7: Can I connect headphones directly to the QXD1?
A7: There is no headphone jack. You can use a dual RCA to 3.5mm adapter cable to connect some low-impedance headphones. For HiFi headphones, it is recommended to use a headphone amplifier.
Q8: Can it connect to speakers?
A8: It can connect to active speakers. Passive speakers require an external power amplifier.
Q9: What are the op-amp models in the QXD1?
A9: I/V Circuit: OPA1612 * 2; LPF Circuit: RT6863 * 2.
Q10: What crystal oscillator frequencies are used in the QXD1?
A10: 24 MHz; 45.1584 MHz; 49.152 MHz; 100 MHz.
Q11: The QXD1 is connected and the input is set, but there's no sound. Why?
A11: The initial boot volume is set to minimum. You need to increase the volume. Long press the volume '+' button to increase volume quickly.
Q12: When connected via USB to a computer using Foobar2000 to play a DSD file, and coaxial output to another DAC, why is there no sound?
A12: The DSD to coaxial SPDIF conversion function is not enabled.
Q13: Why is there no response after powering on the QXD1 and connecting cables? Only the power indicator is on.
A13: This is due to insufficient power supply. The unit did not start normally. When started correctly, both the power indicator and the USB indicator will light up.
Q14: Why does the power indicator keep flashing after powering on the QXD1, and there's a repeated clicking sound?
A14: This is due to insufficient power supply. The main board is stuck in a reboot loop. The clicking sound is from the relay. Use a different power adapter, recommended specification: 5V/2A or 3A output.
Q15: Can software be used to control the QXD1's audio?
A15: Yes, it supports the generic USB Audio protocol.
Q16: When connected via USB to a computer, the computer goes to sleep. After waking and playing music, the QXD1 needs repowering to get sound?
A16: When some laptops/PCs sleep, the USB port may power down. This disconnects the DAC chip. The QXD1 needs to be repowered/restarted. Desktop PCs generally don't have this issue; you can just resume playback, the QXD1 can stay on.
Q17: Can the QXD1 adjust tone? Does it have DSP?
A17: It does not support tone adjustment. Different filter modes can be set. It does not have DSP.
Q18: Does the QXD1 have ASRC?
A18: Yes, the clock is asynchronous.
Q19: Can the QXD1 be set to a fixed volume?
A19: No, the QXD1 does not have memory function. However, there is a firmware option for maximum volume (Pure DAC Mode). After flashing this firmware, the unit will power on at maximum volume.
Q20: Can the QXD1 be used as a digital transport?
A20: Yes. USB input can be converted to SPDIF Coaxial digital output.
