Introduction​

The dynamic transducer is the most used driver in the audio industry. It is known for its ability to produce powerful dynamic peaks and impactful bass. However, due to limitations in diaphragm stiffness and weight, it is challenging to achieve the ideal diaphragm for optimal performance.

Aesthetic appearance​

From the packaging and accessories, it is evident that the Japanese people pay great attention to detail and have a meticulous approach, setting them apart from other brands in the market. The entire box, both on the outside and inside, is designed in a luxurious white color, adding a touch of elegance to every small aspect.

Sound impression and analysis​

To assess the performance, I use my daily gear as a reference player - the A&K SP3000. I paired it with the Chord Hugo2 as a DAC/AMP and the Cayin C9 to explore the scalability of this IEM. An interchangeable option to explore the diversity in sound matching by source is the L&P P6 Pro 99Ti. In addition to the stock cable, I use the Crystal Cable Dream Duet as my ultimate reference cable. This cable stands out for its exceptional tonal neutrality, speed, and incredible ability to retrieve low-level details, as well as its ability to clarify the timber and nuance.


The brand new A8000 sounds quite harsh and it changes significantly after 20 hours of usage and burning in at moderate volume. It improves the smoothness and microdetail as well as the dynamic impact.

Ear tips are a sensitive matter when it comes to listening to the A8K. The Final E type, which has small tips and a soft cylinder, appears to absorb some energy and micro transients. This has the effect of reducing brightness and sharpness, but sacrificing dynamics and nuance is the trade-off. Tiefe Wasser highlight this problem, with E type the piano sound the same in dynamic, lack sparking top end and lose the piano and contrabass coherence, lead to a emotionless experience. I finally changed to Alza SednaEarfit to get a more dynamic, vibrant presentation.

Bright tonal balance​

From the measurement it can be concluded that the tonal of A8K leans to the neutral bright side with lots of up lifting in midrange and low-treble region, boosting the clarity up-lifting the tone. With the gradually step-up from 1k to 2k region and maintain the response stable, A8K tends to emphasize the harmonic structure of human voice or violin rather than the fundamental.


The bass section has step-up response from 100Hz down to 20Hz, indicating the slight dominance of sub bass impact over mid bass. The slightly exceed amplitude of sub bass extends the image and sound field of lowest octave while lighting fast impulse response keep it not bleeding into the other object in the presentation. It gives A8K a strong and solid foundation of representation, regardless of what genre of music you listen to. The un-balanced ratio in frequency response of A8K affects the ratio between image size of each harmonic's component of instrumental in this region.

Precise and transparent sound stage.​

A8000 gives me the impression of one of the most clear and transparent sound stages in IEMS ever. The image is rendered with a high level of fidelity. The superb clear edge definition not only defines the localization but also gives the refining of how sound of instrumental envelops in time axis.


The edge-definition and micro transient are impressively good. They perfectly handle the movement between silent and dynamic striking passages in the track Solspill, op. 13 Trond Schau - Lasse Thoresen: Sea of Names.

It expands the sound stage width to L/R location and even stretches outer L/R boundary in extended in high quality recording, especially binaural record. There is problems with sound stage that I feel the same with a reviewer have indicated, that is the image focus is shift more on LR more than other IEM and headphone, which make me wonder about these effects. The focus on center image is somehow lacking density than L/R sight. The center plane is flat and shifts the upper part of the vocal and harmonics forward to the listener.

This issue might related to unbalance, a huge dip in the mid range region compared with a elevated low treble in 2-3k region. The second factor might be using the physical filter to shape the FR. I have experience the effect of flattening the center layer and shifting in other while using filter in the nozzle. This is just my assumption from my experience.

The background is exceptionally clear, without any artifacts from the driver itself or internal acoustic issues. I have the same impression of a clean background as Focal Utopia 2022.

Due to the ultra-light weight and stiffness of the Beryllium diaphragm, the A8000 can produce exceptional low-level amplitude detail. This results in a defined and refined recreation of instruments. Additionally, the nearly flat impedance across the frequency range allows you to lower the volume level of your source without losing any detail in the treble or bass. Every detail remains clear, concise, and transparent, even at lower volumes. This means you can still hear the same sound stage and spatial dimensions, but with the images of each musical instrument shrink to their point source. This creates a sense of vast distance between the musical instruments.

The extended sound stage width gives the impression of a 21:9 ratio screen monitor, rather than the traditional 16:9 on the same record. With detail and lightning-fast response speed, the spatial cues and ambiance are reproduced with defined detail. This provides traditional stereo mixing with more space and spatiality, resulting in an immersive feeling.

Plugging in to A&K SP3000, in quite environment, I listen at volume 30 to 40, which is double my ordinary single DD, which need only 15-20 volume level.

Vocal​

The human voice is a crucial element in music. With its bright tone and clear decaying vibration envelope, A8000 provides a detailed representation of vocal tracks. The articulation is excellent, clearly delineating each component of the word (vowel) and the singer's transitions between them. It lends a sharpness and pleasant resonance to soprano voices. Although I noticed some sharpness in the sibilance region, the fast response speed may prevent it from being fatiguing.

One issue I've noticed is that while I have no problems with woodwind instruments like the flute, the vocals seem to lack airiness and airflow stability.

With its V-shaped structure, the fundamental part (vocal track) of the A8K tends to be lean and lacks dynamism and thickness compared to the harmonic parts. This reduces the fullness, weight, and dynamics of mid-range male and female voices. Nevertheless, the A8K renders each vocal piece with freshness and delicacy by blissing brilliance. It may not be the best fit for popular tracks that often contain many faults in the production chain. However, with higher quality tracks found in genres like folk, opera, and Celtic, the A8K truly shines.

Instrument performance​

A piano perfectly showcases the speed and dynamic range of the A8K. Its high-speed response and low distortion enable piano notes to project effortlessly. The detailed progression of a note's envelope, from the hammer strike to sustain and harmonic resonance, is distinctly clear. The A8K effectively captures the pace and silence between notes, contributing to a strong and accurate representation of tempo. This is particularly evident when listening to La Campanella in G-Sharp Minor. The A8K presents each note with full resolution, speed, and dynamics.

One of the most challenging parts of this song is the last phrase, where low octave notes are struck and then abruptly stopped by the pedal. The A8K recreates these notes with solidity, offering a clear structure envelope between string vibration and body resonance and a instant stop by the pedal. There are some sparkles in your head when listening to this song with A8000. Although the string vibration is defined clearly, I find it less dynamic and solid than Focal Utopia.

The opening track, the title track "Spark," is utterly mesmerizing and spine-tingling. From its solo piano introduction to its ultimate climax, A8000 handles every beat with complete mastery and control. This song might initially seem chaotic to some, but when you grasp the underlying contemporary connection, it delivers a powerful performance, sparking a vivid image in your mind.




In Bacchanale - Minnesota Orchestra, the A8K provides the woodwind and brass instruments with clear and agile expressions. Even in the quietest passage in the middle of the piece, at volume 18 of SP3000, the delicate flute sound is solidly set against a deeply layered background.

Despite its ultra-fast response, the A8K appears to lack coherence, particularly when playing violin instrumentals. This is noticeable in tracks like Violin Concerto in E Minor, Op. 64, MWV O14 (Felix Mendelssohn). The notes seem disconnected and lack continuity, resulting in a performance that feels flat and lacks passion.

If you're interested in the music, you can refer to the playlist that contains songs used in the review.

Paring and comparison​

DAP​

SP3000 and L&P P6 Pro 99Ti​

SP3000 and P6 Pro 99Ti is two outstanding choices in portable DAP market today. SP3000 utilizes AKM 4499EX DAC architecture while P6 Pro 99Ti use R2R architecture.


When paired with the SP3000, the combo leans towards a clean and clear signature. The edge definition is ultra-precise, revealing even the smallest details and movements of the performer or instrument. The micro transients and details surpass those of competitors, enhancing performance across the frequency range. IMO, paring with SP3000 captures the authentic transparency of the A8000, albeit at the expense of reduced engagement associated with any distortion. Operatic compositions are even more delightful when enhanced by this combination.

Contrarily, the P6 Pro 99Ti has a smoother and warmer presentation than its competitor. When using the NOS digital filter mode, the vocals offer richness in tonality, resulting in a pleasing listening experience. The extension to the low-end region is reduced, focusing more on mid-bass punchiness. This adjustment compensates for the dominance of sub-basses on the A8000, making the sound easier to listen to.

Sony Wm1Zm2​

This pairing provides an intriguing combination to explore, exceeding my expectations even though Sony isn't typically my first choice. Together with the 1zmk2, the bright tonality of the A8000 is beautifully balanced, rendering a warmer, richer, and more mainstream sound. The pairing is more accommodating to popular, mainstream music due to its smoother treble representation. The sharpness is rounded out, and the bass section gains additional depth, particularly in the mid-bass region.


While it may not delve into the finest detail and speed like the other two, Wm1zm2 undoubtedly stands as a compelling choice to pair with A8k for those seeking a more mainstream sound.

Final A8000 and Focal Utopia​

Given that they use the same driver material, there's a clear similarity in sound signature between them, particularly in their excellent impulse response. When paired with a portable source, I'm even more impressed with the Final A8K than with the Utopia due to the efficiency of IEMS when paired with a portable DAP. In general, the Focal Utopia has a warmer tone in the mid-range presentation, especially in vocal tracks. The Utopia, utilizing a larger diaphragm, can create a more punchy, dynamic, and dense sound signature.

In the low frequency range, Utopia has roll-off sub bass, while A8K has slight dominance ratio of sub bass. A8K has more extension in sub bass, which extends the sound stage depth further. With piano, A8K shows more presence of piano body resonance while Utopia can represent more dynamic, solid texture and intense forte nuance.

On mid and treble frequency, The A8K show offers fast, sharpness, sparking, and lighter note weight while Utopia has more density and note weight. The two show identical levels of clarity and detail, where I can clearly hear each word in the song more than ordinary items.

Final A8000 and JVC FW10000​

Recently, I've had the opportunity to listen to the JVC FW10000 and would like to offer a comparison between the two distinct sound signature products.

The physical appearance is quite different; while the A8K has a mirror-like surface, the FW10K offers a natural and vintage look with its wooden faceplate.


The FW10K uses a Wood Dome Carbon Diaphragm, which is less efficient than the A8K in terms of performance. The FW10K's sound signature can be described as smooth, with lusty and intense vocals. The frequency response graph shows that the FW10K has a strong mid-bass presence over the sub-bass and a substantial uplift in the high mid-range, with a notable peak in the 2K region. Due to the diaphragm's longer decay response, the FW10K can deliver a good punch and thickness to drum attacks. This long decay translates into a lustrous, sweet vocal and mid-range region, providing a richer sound signature impression. However, its downsides include a slow speed response.

On the contrary, the A8K provides lightning-fast response speed due to its utilization of true beryllium diaphragms. This higher speed response translates into a cleaner and clearer sound signature. The vocals are sweet but more clarity and detail. I can hear each vowel more clearly and understand how each word is pronounced. In mid and treble region, A8K sounds even brighter with broader up-lift region.

External Amplification​

Rated at 102 dB (presumably at 1 kHz @ 1 mW), the A8K is less efficient compared to other single dynamic driver IEMs. Although it can be adequately driven with modern DAPs like the SP3000 or P6 pro, the A8K could benefit from more powerful amplification.

The Cayin C9 offers increased body, thickness, and control, whereas the Hugo2 emphasizes sharpness and micro-transients. Given its low distortion profile, the A8K can distinguish between the C9's amplification modes easily.


Hugo2 provides the A8k with an energetic and lightning-fast response. The drums and percussion have more authority and impact, while the treble gains more energy, sharpness, and edge definition. It controls the A8K effortlessly, without any distortion, from concerto to symphony tracks.

Eartips​

Eartip comfort is a sensitive topic as it varies for each user based on the shape of their ears. In this discussion, I want to emphasize the bright tonal quality of the A8000. The stock eartips might counteract its natural characteristics, but this could compromise micro dynamics and nuance. The Alza SednaEarfit may unlock all potential, but it might not be suitable for extended listening sessions. Softer eartip material can mitigate the brightness and provide comfort for long listening sessions, albeit at the cost of some dynamic and contrast.

Final thought​

In one hand, the A8000 falls short in terms of a well-balanced tuning approach. Its thin mid-range raises the overall perception of tonal bias towards the neutral-bright side, which affects the timber of instruments and lacks density, warmth, and extreme fortissimo nuance. This tonality is preferable for baroque period or Celtic music duos due to its resonance in tonal qualities. The A8000 tends to amplify the joy, vitality, and agile aspects of music.

On the other hand, Final has accomplished a significant level of completion in specific engineering aspects and technicalities, surpassing some over-hyped flagship devices currently available. The exceptional physical properties of beryllium material have made it highly desirable for single dynamic full-range IEMs. While diamond could potentially challenge this performance, its expensive price and technological limitations pose a barrier that prevents any brand from pushing the boundaries further.

In conclusion, while the Final A8000 may not be a perfectly tuned IEM, it offers a distinctive flavor and transparency that sets it apart in the audio industry. Paired with the right gear and music, the A8000 can provide a unique and exquisite musical journey.