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PEQ, Bluetooth & Output
The HiBy FD5 supports firmware updates via USB and is compatible with the HiBy’s new “HiBy USB Master” software, which unlocks its advanced parametric equalizer, aka PEQ functionality. The PEQ allows for highly detailed sound equalization with 10 adjustable bands. Each band can be configured with different filter types (low-shelf, high-shelf, peak, etc.), and users can adjust the gain and Q factor precisely. The software also lets you import and export PEQ profiles, making it easy to share or load pre-made settings. My unit shipped with firmware version 1.0, but the latest version is 1.20 as of now, and both the firmware package and the HiBy USB Master software can be downloaded from HiBy’s support page here: HiBy FD5 Firmware Update.
The FD5 features a 1.1-inch color OLED display on its top side, which provides information such as volume, active output, active input, gain level, and active amplifier mode. The bright display and vibrant theme make all elements easy to read, even in varying lighting conditions. As for thermal management, the device runs warm but not hot in the Class AB mode. However, in Class A mode, the FD5 runs considerably hotter. I’d say it’s around 50% hotter than my Hugo 2, which may be uncomfortable for some users, so I had the urge to point this out.
The FD5 supports wireless audio via Bluetooth, offering Hi-Res compatibility with LDAC and HiBy’s proprietary UAT codec. UAT stands for Ultra Audio Transmission, which requires the HiBy Music app available on smartphone app stores and comes pre-loaded in HiBy DAPs, allowing for 192kHz sample and 1200kbps bit rates wirelessly. The LDAC works well with a range of 10m and pretty good signal stability. I have not experienced any cutouts with my CMF Phone 1. Sadly, my 16 Pro Max is still stuck with its AAC codec. That said, HiBy does not specify which Bluetooth chip is used in the FD5.
Regarding output power, the FD5 delivers 1523mW at 32Ω through its 4.4mm balanced output and 475mW at 32Ω via the 3.5mm single-ended output. Its output impedance is low, so there are no compatibility issues with sensitive multi-driver IEMs. I observed no audible hiss or background noise. It can drive 90% of the headphones out there without any problems.
Isolated Power Supply
The HiBy FD5 features an isolated power supply. In simple terms, a power supply provides the energy that these circuits need to function, much like how fuel powers a car. Its primary role is to provide power to the circuitry, but the quality of that power directly impacts the performance of sensitive audio components. Noise or instability in the power supply can introduce unwanted artifacts, such as distortion or jitter, negatively affecting the SQ.
In DACs, the conversion process relies on precise timing and low-noise environments to accurately translate digital signals into analog. Similarly, amplifier circuits require clean and stable power to multiply the signal without introducing interference. Any electrical noise or fluctuation in the power source can contaminate the signal path, leading to a loss of detail, clarity, or dynamic range.
The FD5 addresses this by dedicating an entire lower deck to power management, where tasks such as filtering, regeneration, and voltage regulation are performed. This isolation ensures that the upper deck, which houses the DAC and amplifier circuits, receives a stable and interference-free power supply. By physically separating the power circuitry from the audio components, the design minimizes the risk of noise coupling or cross-talk, allowing it to deliver a cleaner sound.
Comparisons
vs. Topping D50 III & A50 III Stack ($428 USD)
We have two viable DAC & AMP stacks with similar price tags here. However, they are more different than alike. I won’t be covering I/O options, design, and the rest of the feature sets; you can see those easily. I’m using Volür and Ananda Nano for this comparison, volume-matched.
Sound-wise, the Topping D50 III & A50 III stack is more linear and more neutral, with less colored tonality overall. The FD5 sounds slightly more exciting and dynamic, but the Topping stack offers a better detail-retrieval, especially in the midrange and upper-mid region. In terms of power, the Topping stack holds the upper hand, delivering almost double the output of the FD5. This makes it a better option for driving demanding full-size headphones. However, for more sensitive IEMs or moderately power-hungry headphones, the FD5’s output power is more than sufficient.
When it comes to resolution, both devices are neck and neck, which is quite impressive given that the FD5 marks HiBy’s first desktop DAC & AMP. Detail retrieval is similarly comparable, with neither pulling far ahead. Overall, the FD5’s dynamic and slightly colored tuning offers a refreshing alternative to the Topping stack’s more neutral presentation, which is quite impressive for HiBy as it’s their first real foray into the desktop market. A solid entry, indeed!
vs. ZEN DAC 3 & ZEN CAN 3 Stack ($458 USD)
The iFi ZEN DAC 3 & ZEN CAN 3 stack is another popular contender in this price bracket, and like the FD5, it offers a distinctive flavor. For this comparison, I used the Volür and Ananda Nano, with both devices volume matched.
Right off the bat, the ZEN 3 stack presents a warmer tonality, with a more conservative treble and a noticeable mid-bass elevation that adds weight to the bass and midrange regions. The midrange sounds slightly fuller and slightly richer compared to the FD5, though it does come at the expense of a bit of clarity. Male vocals, in particular, have a weightier and more engaging presentation with the ZEN stack, which some vocal lovers might prefer.
The FD5, however, shines with its slightly superior resolution and much better sense of dynamism. Its more extended treble and tighter/tidier mid-bass give it an edge in delivering excellent detail and energy, which translates to a more exciting and toe-tapping experience. For tracks with a lot of treble or fast transients, the FD5’s presentation feels more vivid.
Ultimately, the choice between the two comes down to personal preference. If you prefer a warmer, fuller sound with a touch of mid-bass emphasis and a more controlled upper register, the ZEN stack might be the better fit for you. However, if you value a slightly cleaner and significantly more dynamic sound signature, the FD5 is likely to align better with your tastes. For me, the FD5’s bite wins out in this comparison.
Last Words
The HiBy FD5 is an impressive first entry into the desktop DAC & AMP market from HiBy. With its dynamic and exciting presentation, unique design, and features like an LDAC and PEQ support, it offers a nice package at its price point. HiBy’s execution here shows great promise, and I hope they continue to build on this foundation in future releases.
Summary
Pros:
+ Good technical foundation
+ Great tuning
+ Unique Design
+ Excellent build quality
Cons:
– Class A mode heats up the device considerably
Page 1: HiBy, FD5, Packaging & Accessories, Design & Build Quality, Sound Impressions
Page 2: Sound Detail, Features, Comparison, Last Words
