Descrizione
Every Recording Ends as a Voltage. What Happens in Between Is Everything. On a hard drive, a piece of music is nothing but a list of numbers. Between that list and the air in your room sits a single device whose only job is to translate, and the quality of that translation decides whether you hear a performance or a file. The Fosi Audio ZD3 exists for that one task. It is a fully balanced desktop DAC and preamp that accepts digital signal from six different sources and hands it to your amplifier as clean analog voltage, with as little added noise as the chipset can physically manage.
The architecture is deliberately uncompromising. An XMOS XU316 USB interface feeds an ES9039Q2M converter, the flagship ESS chip, while a QCC3031 module handles Bluetooth and a pair of LME49720 op-amps condition the output stage. The measured signal-to-noise ratio is 126dB and total harmonic distortion stays below 0.00008 percent, with support for PCM up to 32-bit and 768kHz and native DSD512. Because the outputs are fully balanced XLR as well as single-ended RCA, the ZD3 can anchor a serious stereo system or drive studio monitors from a desk. The HDMI ARC input, a first for the brand, lets a television feed the same converter, while the 1.5-inch OLED display, remote control, preamp bypass switch, and 12V trigger in and out turn it into a proper system component rather than a dongle.
It is equally at home in three rooms. On a desk it replaces the mediocre converter inside a computer and gives headphones or active speakers a quiet, honest source. In a living-room stereo, HDMI ARC makes it the audio return path for a television while USB and optical serve a streamer. In a studio rack, balanced XLR runs keep long cable lengths free of hum. The available configurations mirror those three lives, from a 12V power supply version to a bundle paired with the ZA3 stereo amplifier and one built around the V3 MONO monoblock.
The signal is only as honest as the room it passes through.
Design Notes
- ✦ XMOS XU316 USB interface driving a flagship ES9039Q2M converter
- ✦ Fully balanced XLR outputs alongside single-ended RCA
- ✦ HDMI ARC, optical, coaxial, USB and Bluetooth inputs on one chassis
- ✦ 126dB signal-to-noise ratio with total harmonic distortion below 0.00008 percent
- ✦ PCM up to 32-bit and 768kHz, plus native DSD512 decoding
- ✦ 1.5-inch OLED display with an included remote control
- ✦ Preamp bypass switch and 12V trigger in and out for system linking
Specification Ledger
- ModelFosi Audio ZD3 desktop DAC and preamp
- ConverterES9039Q2M
- USB InterfaceXMOS XU316
- BluetoothVersion 5.0, QCC3031 module
- Bluetooth CodecsSBC, AAC, aptX, aptX HD
- InputsUSB, HDMI ARC, coaxial, optical, Bluetooth
- OutputsBalanced XLR and RCA
- Signal to Noise Ratio126dB
- Total Harmonic DistortionBelow 0.00008 percent
- Maximum ResolutionPCM 32-bit / 768kHz, DSD512
- Display and Control1.5-inch OLED, remote, preamp bypass, 12V trigger
- ChassisMetal
Where It Belongs
A desktop near-field system that deserves better than a laptop headphone jack. A living-room stereo fed by a television through HDMI ARC and by a streamer through USB or optical. A studio or mastering desk where the balanced XLR path carries signal across a room without collecting interference. In each case the ZD3 plays the same role, converting with precision and then getting out of the way.
Buyer Questions
Q: Does the ZD3 include its own power supply?
The standard configuration ships with a 12V power supply. Higher configurations add amplification, such as the ZA3 stereo amplifier or the V3 MONO monoblock, and each bundle is listed as its own option.
Q: Can it drive passive speakers directly?
No. The ZD3 is a DAC and preamp, not a power amplifier, so passive speakers need an amplifier downstream. Active or powered speakers with an analog input connect straight to the RCA or XLR outputs.
Q: What does the HDMI ARC input actually add?
It lets a television send its audio back down the HDMI cable into the DAC, so a single system handles both music and screen sound without a separate box or an extra cable run.
Q: Is the output genuinely balanced?
Yes. The XLR outputs are fully balanced, which is why the converter is described as balanced end to end rather than single-ended with an XLR socket bolted on.
Q: Which Bluetooth codecs are supported?
SBC, AAC, aptX and aptX HD, which covers high-quality wireless streaming from phones, tablets and computers without a cable.
Q: Will it improve an existing stereo setup?
It gives a digital source a lower-noise conversion path and a balanced output, so the audible change is usually a quieter background and cleaner separation between instruments.








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