The Fosi Audio ZD3 Pre-Amp and DAC is a compelling entry-level audio device that punches well above its weight. This comprehensive review delves into its features, performance, and overall value proposition, offering a detailed look at what this versatile unit has to offer. From its sleek design and intuitive interface to its extensive connectivity options, we explore every aspect of the ZD3 experience. We examine its unique ability to swap op-amps, allowing users to tailor the sound profile to their personal preferences, a feature rarely seen in this price bracket.This review covers not only the technical specifications and performance benchmarks, as corroborated by the respected Audio Science Review, but also includes a personal listening experience and comparison of different input and output options. We assess the practical usability and real-world performance of the ZD3, considering its suitability for various audio setups and user needs. Ultimately, we aim to determine whether the Fosi Audio ZD3 represents a worthwhile investment for audio enthusiasts seeking a high-quality, feature-rich DAC and preamplifier.
Pros And Cons
- Superb connectivity
- Rates incredibly highly against competition
- Well-featured
- Excellent score in Audio Science Review tests
- Includes interchangeable op-amps for sound profile adjustment
- Nice-looking design
- Good build quality
- Includes remote control for volume and function control (when paired with ZA3)
- Neutral sound (adjustable with op-amps)
- Competitively priced for its technology and features
- Requires pairing with an amplifier to maximize performance
- Only provides 2.1 sound system output (with subwoofer)
Read more: Fiio K11 R2R DAC/Amp Review: A Worthy Upgrade or Redundant Luxury?
Unboxing and Initial Impressions
The Fosi Audio ZD3 arrives in a well-packaged box containing the unit itself, a USB cable, Bluetooth antenna, 12V power supply, 12V trigger switch, remote control, and a user manual. The ZD3 boasts a sleek design and a user-friendly interface, with a circular OLED display clearly showing the selected input source.

The front panel features a burnt orange button for power and volume control, allowing for seamless operation. The rear panel provides extensive connectivity options, including XLR and RCA outputs, various digital inputs (coax, optical, HDMI ARC), a USB input, and a 12V trigger input. This comprehensive connectivity ensures compatibility with a wide range of audio sources and amplifiers.

Operational Features and Interchangeable Op-Amps
A unique feature of the ZD3 is its inclusion of three interchangeable op-amps. This allows for customization of the sound profile, enabling users to tailor the audio output to their preferences. Different op-amps produce different sound signatures, ranging from warmer and smoother to sharper and clearer.

The ability to change op-amps offers a level of personalization not found in many DACs in this price range, akin to changing valves in a tube amplifier. The unit also includes a switch to disable the preamp stage, enabling it to function solely as a DAC.

Performance and Sound Quality
The Fosi Audio ZD3 receives high praise from Audio Science Review, achieving an excellent score. Its performance across various tests, including frequency response and noise measurements, is exceptional, especially considering its price point. The review covers balanced XLR, RCA, and HDMI ARC outputs, highlighting the versatility and quality of the device.
My personal experience confirms the positive findings. I tested the ZD3 with both Bluetooth and optical inputs, finding the optical input yielded superior sound quality. The HDMI ARC connection to my television worked flawlessly, offering convenient volume control using the TV remote. A comparison between XLR and RCA outputs revealed a significant improvement in clarity with the balanced XLR connection.
Conclusion and Recommendation
The Fosi Audio ZD3 is a well-designed and feature-rich DAC and pre-amplifier offering excellent value for its price. Its attractive design, extensive connectivity, and customizability with interchangeable op-amps make it a compelling choice for audio enthusiasts.
While not the cheapest option, its performance rivals more expensive units. Pairing it with the Fosi Audio ZA3 amplifier creates a potent and aesthetically pleasing desktop or main audio system. However, consider your needs: do you require the full connectivity? Do you want op-amp swapping? Is the build quality and appearance important to you? The answer to these questions will determine if the ZD3 is right for you.