Review of the Final Audio A4000

The Final Audio A4000 impresses not only with its comfort and fit, but also with its sound quality. Released in December 2020, this model developed by Final Audio introduces several innovations when compared to what is found in the brand’s B series, such as the Final Audio B3, which I own. Overall, it is a very user-friendly earphone for extended listening sessions, as will be demonstrated in this review.

Build Quality of the Final Audio A4000

The construction of the Final Audio A4000 seems to have been designed to provide an excellent level of comfort. Both the earphones and their cable are lightweight, and even after hours of listening to music, I did not experience any pain, which was something I initially feared due to the pointed areas of its body (housing, shell).

Although the A4000 has a body that is very similar to the B3, there are some differences. Its tips are more rounded, with smoother curves. As a result, I did not feel the structure of the earphone “pressing” or “digging into” the concha of my ears.

The cable, although simple, has good flexibility, is lightweight, and does not tangle easily. I can coil it without difficulty, and I did not notice its weight interfering when resting behind the ear, which can occur depending on the material used.

There is a pair of hooks to “dress” the cable on the section that passes behind the ear. I did not feel the need to use this accessory, although it demonstrates the company’s attention to user comfort.

A 2-pin connector was used in the A4000 instead of the MMCX connector adopted in several Final Audio models. However, this is a proprietary connector, and I was unable to use third-party cables, only the one manufactured by Final Audio itself.

I noticed that even though 2-pin connectors generally have a similar structure, the traditional connector has a larger plastic housing and longer pins than the one used by Final Audio. Consequently, I was not able to fit even the initial portion of the connector.

Like several other Final Audio models, the A4000 comes with a case developed by the brand itself, made of flexible rubber. The accessory is compact and easy to handle, but I had some difficulty securing its lid.

Sound of the Final Audio A4000

The Final Audio A4000 emphasizes the upper mids, treble, and upper treble, showing excellent performance in instrumental and percussion music, as well as in tracks that predominantly feature string and wind instruments, with greater activity in the higher frequencies, and cymbals. There is good extension and naturalness in the high-frequency timbres.

The midrange of the A4000 struck me as neutral, integrating well with the rest of the sound spectrum, without sounding recessed or overly forward. In addition, I did not perceive masking issues in the midrange region caused by bass activity.

The bass and sub-bass have good presence and prevent the music from sounding “dull.” However, I noticed a certain lack of mid-bass, which is the region responsible for providing “body” to low frequencies. In my interpretation, the A4000 does not present bass that fills the acoustic space.

I believe that, due to its reduced mid-bass activity, the A4000 is able to deliver a presentation that conveys a greater sense of space between instruments, making the sound more “airy.” The emphasis on treble also contributes to further highlighting this characteristic.

Conclusion

The Final Audio A4000 has a very distinctive sound signature that I have not found in any other in-ear monitor. Its tuning prioritizes the higher frequencies, delivering a high level of detail and a very natural timbre for instrumental sounds. In addition, its comfort and fit are excellent, matching what I experienced with the Sennheiser IE 200.