Douk Audio A5 3255 Mini Amp Review and Comparison vs Fosi and Aiyima

Summary

In this detailed review, Rick evaluates the Do Audio A5 amplifier, a compact, budget-friendly device offering impressive performance for its price. Priced at $89 (or $99 with tariffs), the A5 delivers clean audio with a smooth THD of 0.2% and an SNR of 114 dB. Its standout features include a high-pass filter, full-range pre-out, and postfilter feedback (PFB) circuitry, which enhances sound quality. While the build and design could use some tweaks, the A5 competes well with higher-priced options in terms of sound stage and imaging. Rick highly recommends the A5 as an affordable, high-performance option for audio enthusiasts.

Takeaways

• 😀 The DO Audio A5 is priced at $89 (on DO's website) or $99 (on Amazon USA) and offers great value for money in its category.
• 😀 The amplifier delivers 65W per channel at 8 ohms with the included 32V power supply, and up to 100W per channel with an optional 48V power supply.
• 😀 The A5 features a low THD+N of 0.2% and a signal-to-noise ratio of 114dB, ensuring clear and high-quality audio performance.
• 😀 The A5 is ideal for use with 4 to 8-ohm speakers, offering versatility for various setups.
• 😀 One of the standout features of the A5 is the high-pass filter knob, which ranges from 30Hz to 200Hz and allows for fine-tuning of the audio.
• 😀 The amplifier includes a 3.5mm full-range pre-out, making it possible to connect a powered subwoofer and integrate it into the system seamlessly.
• 😀 The high-pass filter on the A5 does not negatively affect sound quality, ensuring that soundstage, imaging, and dynamics remain intact even when adjusted.
• 😀 The A5's design features a sleek matte black circuit board and customizable RGB LED lighting, adding an aesthetic appeal to the unit.
• 😀 While the A5’s binding posts are smaller than standard, the overall compact size and price of the amplifier make this acceptable.
• 😀 The A5 competes well with other amplifiers in its price range, offering superior soundstage and imaging compared to models like the FY Audio BT28 Pro and Fucy ZA3.
• 😀 The A5 is able to compete closely with high-end amps like the Iota VX PA3, offering 95% of the sound quality at a fraction of the price, making it an excellent budget option.

Q & A

What is the price of the Do A5 amplifier?

The Do A5 amplifier was initially priced at $89, but it is currently listed at $99 on Amazon USA. However, it is still available for $89 on Do Audio's website if you are outside the US.

What is the power output of the Do A5 amplifier?

The Do A5 outputs around 65 watts per channel on an 8-ohm speaker with the included 32-volt power supply. If you purchase an additional 48-volt power supply, it can output around 100 watts per channel on 8-ohm speakers.

What are the key specifications of the Do A5 amplifier?

The Do A5 has a Total Harmonic Distortion (THD) plus Noise (n) of 0.2%, a signal-to-noise ratio of 114 dB, and is designed for 4 to 8-ohm speakers.

What are some standout features of the Do A5 amplifier's design?

The Do A5 features a high-pass filter knob with a frequency range from 30 Hz to 200 Hz, a smooth volume and power knob, venting on the sides and bottom of the chassis, and a set of dip switches for controlling internal RGB lighting.

How does the high-pass filter on the Do A5 work?

The high-pass filter on the Do A5 allows users to adjust the cutoff frequency between 30 Hz and 200 Hz. It helps manage the bass response by rolling off low frequencies without compromising the soundstage or dynamics of the system.

What is the function of the 3.5mm output on the Do A5?

The 3.5mm output on the Do A5 is a full-range pre-out. This allows users to connect a powered subwoofer or powered subs, and the A5's volume knob will control the output to both the main speakers and the subwoofer.

How does the Do A5 compare to other amplifiers in its price range?

In terms of performance, the Do A5 is considered a value leader, offering superior sound quality and features at its $99 price point. It outperforms some similarly priced competitors like the FY Audio BT28 Pro, providing better soundstage and imaging.

What are the differences between the Do A5 and the FY Audio BT28 Pro?

The Do A5 offers a larger soundstage, better imaging, and more defined vocals compared to the FY Audio BT28 Pro. While the bass performance is similar between the two, the A5 stands out in terms of overall sound quality and clarity.

What is Postfilter Feedback Circuitry (PFB), and how does it benefit the Do A5?

Postfilter Feedback Circuitry (PFB) is a technique used to reduce distortion and maintain a more linear frequency response by decreasing the amplifier's low dependency. This helps improve sound quality, especially when paired with speakers that have complex impedance curves.

What are some potential improvements that could be made to the Do A5 amplifier?

One suggested improvement is offering an option for a 48-volt power supply, which would provide users with better performance. Additionally, providing more robust, secure attachments for the glass cover would enhance the amplifier's durability and user experience.