FiiO Q5 DAC/Amplifier Review

FiiO Q5 DAC/Amplifier

Conceptualised in May 2015 as the company’s flagship Portable DAC/Amplifier, the FiiO Q5 was originally named FiiO E19 to reflect its positioning over the FiiO E17. Eventually named FiiO Q5, the device is the company’s third offering of the Q series of DAC/Amplifier after Q1 and Q1 Mark II.

The device was launched during the FiiO Autumn Launch Event on the 4th of November in 2017, 918 days or 2 years, 6 months, 3 days since its conceptualisation. This event was particularly meaningful for Porta-Fi as this was the first time, we were covering a launch event in China since our founding on the 1st of September 2017.

For Q5 to be the company’s Flagship Portable DAC/Amplifier, it has to be comprehensive and this was when things got a little obscure as there was no parallel offering in the market. At the point of conceptualisation, the Digital Audio Players (DAPs) offered by FiiO was only capable of decoding up to 24-bit/192 kHz. FiiO wanted Q5 to be its first dual offering, capable of decoding up to 32-bit/384 kHz, the ability to support the interchangeable Amplifier Modules first introduced on the FiiO X7 as well as supporting multiple inputs which included coaxial, optical, line-in and Bluetooth.

FiiO eventually went public on the project on the 21st of June 2015 and feedbacks from the online community contributed to the realignment of the project which added MFi and mobile device compatibility as one of the key functionalities as well as an added emphasis on interchangeable Amplifier Modules and Bluetooth.

Design and Build

FiiO Q5 DAC/Amplifier

Encased in an all-aluminium sandblasted titanium colour finished chassis which was CNC’d from a single piece of aluminium alloy, the FiiO Q5 weighs in at just 195g with dimensions measuring 124mm (L) x 64mm (W) x 16mm (H). The brushed-metal finish on the front panel adds subtle aesthetics to the premium finish and build quality.

Well-sized for one-hand usage, the Q5 sports a piece of polyurethane leather at the rear of the device, this provides a nice contact and grip when held in one’s hands, insulation for the Bluetooth antenna as well as protection from scratches from stacking usage or when placed on a table top.

FiiO Q5 DAC/Amplifier

At the left side of the device, one would find a 3-button multi-functional playback control (previous track, play/pause and forward track) for use when in Bluetooth mode. When not in Bluetooth mode, The forward track button toggles between coaxial, optical, and line-in input. The play/pause button also switches Bluetooth mode on or off as well as enabling Bluetooth pairing mode on long press. At the bottom left, one would find one of the two Micro USB port on the Q5, the other one being at the bottom on the Amplifier Module.  Designed solely for charging the Q5, the configuration ensures cleaner power to avoid degeneration of sound quality as well as preventing the draining of the battery in scenarios where insufficient power is provided by the USB port transmitting digital audio signals.

FiiO Q5 DAC/Amplifier

Moving on to the upper right side of the Q5, one would find two gently sloping “ramps”, ergonomically designed to guide one’s fingers to the volume knob. The angled notches coupled with a red ring around the subtly protruding knob and the power button below it adds an element of style to the overall look. The power button also has an LED at the centre to indicate the on/off state of the device. A DSD indicator light which will light up in green when DSD audio is transmitted to the Q5 in USB-DAC mode is located below the power button to complete the line-up on the right.

FiiO Q5 DAC/Amplifier

At the top of the Q5, one would find the gain switch, the bass switch, a 3.5mm coaxial/optical/line-in combo jack and a line-out jack. The 3.5mm coaxial/optical/line-in combo jack allows one to connect the Q5 with any device that supports optical output without any need for drivers as well as allowing one to use the Q5 as a standalone headphone amplifier when line-in is used.

FiiO Q5 DAC/Amplifier

The bottom of the Q5 is where you would find the interchangeable Amplifier Module, fully compatible with the Amplifier Modules available from FiiO for the X7 and X7 Mark II. The Q5 is bundled with the AM3A Amplifier Module which is also bundled with the X7 Mark II. The AM3A Amplifier Module which features a 2.5mm balanced output as well as a 3.5mm single-ended output uses the widely-acclaimed AD8620 precision, wide bandwidth JFET operational amplifier coupled with a tailor-made OPA926 op-amp which was exclusively designed to meet the requirements of the FiiO engineers when developing the X7 Mark II.

Let’s now take a look at the internals of the Q5 to see how it complements the external components to achieve the objective of supporting multiple inputs which included coaxial, optical, line-in and Bluetooth. At the heart of the Q5 is the XMOS XUF208 microcontroller through which audio signals are directly passed to the device’s pair of AK4490EN DAC chips from AKM to achieve reduced total harmonic distortion and crosstalk effectively translating into a lower noise floor. The same is in place with respect to digital audio signals from the Bluetooth, USB-DAC, coaxial, and optical interfaces.

In the case of Bluetooth, the Q5 uses the Qualcomm CSR8670 purely for Bluetooth Transmission, bypassing the chip internal DAC and passes the digital Bluetooth audio signals via the XMOS chip to the AK4490EN DAC chip.

Further on the digital side of things, the team also implemented an MSP432 microcontroller to ensure that audio signals are precisely handled with lower power consumption for longer battery life while the device’s volume control is based on an ingenious ADC mechanism using NJR NJW1195 volume control chip, which is designed to eradicate problems such as volume imbalance between the left and right channels as well as extra noise while increasing overall adjustment accuracy. Compared to the Q1 Mark II, the Q5 has 256 more levels of adjustment to the volume.

To complement the digital components, the Q5’s low-pass filter section employs Texas Instruments’ high-performance OPA1642, coupled with Panasonic film capacitors are evidence of the development team’s commitment to achieving the best audio experience possible for the company’s Flagship DAC/Amplifier.

It is important to also highlight that the team has also implemented seven low-dropout (LDO) regulators, one each for the DAC, line-out, volume control, low-pass filter, amplifier, XMOS, and Bluetooth sections. Each of these sections has its own power supply circuit for cleaner power with minimal interference.

On the certification front, the Q5 has achieved its objective of being MFi certified ensuring that it will flawlessly work with any of Apple’s devices, it is also “Hi-Res Audio” capable by the Japan Audio Society as well as support for Qualcomm’s aptX codec which is supported by CSR8670 Bluetooth chip implemented on the device.

Mobile device compatibility is a key priority of FiiO when designing the Q5, and Android compatibility is always a talking point in this regard. While it is right to say that Q5 is compatible with Android devices. In fact, efforts have been made to ensure that Q5 is one of the most complete models of its kind on the market in terms of compatibility. However, due to the number of Android devices in the market, and the lack of a standardized implementation, one can understand why FiiO being a responsible manufacturer cannot cite compatibility with Android devices when it cannot be confident of 100% compatibility.

FiiO Q5 DAC/Amplifier

Further mobile device compatibility, Sony Walkman users can use the Q5 as a USB-DAC via the WM-Port interface with the FiiO L27 cable, which is an optional accessory.

Battery life of at least 8 hours is a benchmark at Porta-Fi to consider that a device is truly portable, particularly when it is a companion to a digital transport or source. The FiiO Q5 features at 3,800 mAh battery which during the review process registered an average battery life of 10 hours and 32 mins when using Bluetooth, USB DAC, coaxial, and optical interfaces. When used as a standalone headphone amplifier, the device registered an average of 26 hours and 11 mins.

FiiO Q5 DAC/Amplifier

Included in the box alongside the DAC/Amplifier is a short Lightning-to-Micro USB cable, a long USB Type-A to Micro USB cable, a 3.5mm cable, two long straps for stacking, two short straps for stacking, a coaxial adaptor, an optical adaptor, a screwdriver for use with the amplifier modules, a non-slip mat, and a carrying pouch.

Part 1: Introduction, Design and Build
Part 2: Sound Quality
Part 3: Product Specifications
Part 4: Review Ratings, Summary


  • Goh Beng Yeow

    Goh Beng Yeow, the Founder / Editor at Porta-Fi™, is a recipient of the IT Youth Award in Singapore. Twice nominated for EY Entrepreneur of the Year Awards, Beng Yeow has previously founded startups such as, Coded Pixels Consultants and was a Tech writer for TODAY, a national daily newspaper under MediaCorp. Since 2017, he has been writing, editing and producing commentaries, interviews, news and reviews on Porta-Fi™. In 2019, Beng Yeow was appointed Advisor to LHDC™, the industry's latest low latency and high-definition Bluetooth audio codec.

    View all posts



Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.