Aful Performer 8S Review – Headfonia

Today, we are reviewing the AFUL Performer 8S IEM. It is priced at $389.99 USD.

Disclaimer: AFUL sent us the Performer 8S for this review. As always, I am here to convey my honest experience with the product.

AFUL

Established in 2018, AFUL began its journey with an expert acoustic team dedicated to advancing audio technology. By 2019, the team had developed prototypes featuring innovative circuit topology and acoustic structures, significantly enhancing traditional designs with BA drivers.

Through continuous technological advancements, AFUL secured three patents in 2020 and commercialized its S&E Math technology in 2021, receiving recognition from the Chinese Academy of Sciences and support from the Suzhou Municipal Government. The launch of the Performer series earphones in 2022 marked a global success.

In 2023, AFUL launched the Performer 8, followed later by the MagicOne, showcasing AFUL’s acoustic know-how.

2024 saw a more aggressive expansion. The Explorer arrived in April, while the Cantor debuted in August as the flagship. AFUL closed out the year with the Performer 5+2.

In 2025, AFUL stepped outside the IEM category for the first time with the PolarNight classic earbud, before releasing the Dawn-X, the brand’s most ambitious IEM to date, a 14-driver quad-brid flagship combining dynamic, balanced armature, electrostatic, and bone conduction drivers in a single shell.

Now, the Performer 8S is rolling out globally as AFUL continues to build across multiple price points and driver configurations.

As Headfonia, we covered nearly all that is AFUL: the Performer 8, the Performer 5+2, the MagicOne, the Explorer, the Cantor, and the Dawn-X flagship IEMs. You can check out those reviews by clicking on their names. Let’s get to today’s highlight, the Performer 8S, without further ado.

AFUL Performer 8S

The Performer 8S is AFUL’s latest entry into the mid-fi segment, positioned as a successor to the Performer 8. We’ve recently seen with the AFUL Performer 5+2 that AFUL has moved into quadbrid territory with the introduction of the Micro-Planar driver, and the 8S continues this trend. The 8S houses one dynamic driver, six balanced armature drivers, and one micro-planar driver. Additionally, it comes with a passive radiator on each side.

AFUL states that the adjustable passive radiator system allows users to switch between open and closed modes. In each mode, sound is manipulated accordingly, and we’ll talk more about this in the sound section.

As a company with vast acoustic expertise, AFUL has, of course, incorporated several technologies within the 8S. Just like the rest of the performer series, it uses highly accurate 3d printed acoustic pathways and pressure-relief chambers on each side, minimizing pressure buildup.

Also, there’s a new tech AFUL calls ”RESInators” which uses 3D-printed micro-resonant channels that correct the non-ideal driver behavior and match their performance across the frequency band. A side-step way of tuning a driver, removing unwanted frequencies or peaks. All of these are evolutions of patents the brand has been refining since the Performer series began.

The Performer 8S is available on HifiGO for $389.99 USD, also on Amazon and AliExpress, with a choice of 3.5mm or 4.4mm termination at the time of purchase.

Packaging & Accessories

The Performer 8S arrives in a large, galaxy-themed box that features the Jupiter artwork on the front panel. The model name is written in silvery lettering, and the bottom of the box lists the key technologies in small badges. Sliding off the outer sleeve and opening the top lid reveals a tidy foam tray with the earpieces seated in precise cutouts on the left and the carrying case sitting alongside on the right.

There’s also a wax paper featuring a diagram of the IEM’s acoustic architecture, labeling the six key technologies in each shell. I like this kind of diagrams and sometimes drawings, it’s a nice addition.

The carrying case itself is a step up from what we saw on the Performer 8. It’s a rectangular leather case with rounded corners, stealth black stitching along the perimeter, and an embossed AFUL logo on the top. It feels solid in the hand and has enough interior volume to fit the IEMs and a dongle comfortably. It’s roomier than the round case of the Performer 8. The material quality and overall craftsmanship of the carrying case are impressively good.

AFUL includes three sets of silicone ear tips, nine pairs in total. Each set comes in small, medium, and large. Something interesting here is that all three sets are almost completely identical in fit, form, and sound. I genuinely don’t know what AFUL tried to achieve with these. I would prefer to see at least 2 different types, foam or a true wide bore, or at least different height ear tips, but this is what we get.

Beyond the tips, there’s a dedicated accessory packet for the passive radiator system. You get a set of small rubber plugs for sealing the PR vent into closed mode, and a set of adhesive dot stickers that serve as an alternative covering method. A cleaning tool is also included, which came in handy for working with the vent area, as it was very hard for me to grab the plug with my bare hands due to its tiny size.

The cable included is a 6-strand hybrid construction using silver-plated 4N single-crystal copper alongside standard single-crystal copper conductors. The cable is available with either 3.5mm or 4.4mm termination, but it does not offer interchangeable ends, so you must choose before ordering the IEMs. Overall, the packaging is nice and all, but at $389, I’d have preferred a better ear tip selection that allows for fit or sound tuning. That said, I really like the carrying case; it’s a clear upgrade over the last gen.

Design, Build Quality & Fit

The Performer 8S takes its design cues from AFUL’s Echoes of Jupiter theme, and these faceplates are among the most impressive designs the brand has produced in the Performer line. As usual, the shells are constructed from medical-grade resin using industrial 3D-printers, finished with a high-gloss coat.

Looking at the faceplate under a light source, you’ll find at least five distinct tones layered into the design: deep crimson, copper-bronze, deep purple, a fine silver shimmer running in diagonal streaks, and scattered iridescent micro-flecks that catch the light differently and change color depending on the angle. There’s an impressive sense of three-dimensional depth in the pattern, which keeps it from looking like a printed graphic.

The AFUL logo sits at the bottom of each faceplate in polished gold, and the nozzle’s wax guard is decorated with a geometric filter that resembles a lotus flower, in silver.

The shell itself is compact and ergonomically shaped. The rear of each shell is where the passive radiator vent is located. I actually quite like the design here. They managed to perfectly achieve a transparent window there, and I had no idea they had this level of control over the 3D-printed shell.

As a build quality feat, this is quite something. The round cutout is perfect, too. It makes me think that if AFUL ever wanted to lean further into aesthetics, showcasing those intricate 3D-printed pathways, much like they did on the MagicOne, could add an amazing visual flair to the next Performer.

As usual, AFUL’s build quality once again impresses me. It’s perfectly clean with no visible seams or rough sections on my unit. The lacquer job is excellent, homogeneous with no visible defects.

As for the fit, it is excellent. The shells are lightweight, the nozzle angle is medium-long for a natural insertion depth, and there’s no discomfort for me. It’s quite compact when you think about the configuration inside, which houses many acoustic structures as well as 8 active and 1 passive drivers.

The compact form factor means they don’t protrude significantly from the ear, which also helps during on-the-go use. I had no issues getting a solid seal with the stock tips in medium, though, as always, tip-rolling will help if you’re after maximum comfort and bass response.

AFUL Performer 8S – Sound Impressions

The Performer 8S is a neutral IEM that is coherently tuned on both ends. It carries a slight bass boost and a treble I would label as neutral. It’s neither spicy nor recessed.

This tuning choice improves its all-around capability considerably, as it is kinder to loosely mastered tracks and genres like metal, while remaining equally proficient in areas where accurate treble reproduction matters most, such as Jazz.

Adequate presence means the 8S never tips into tinny timbre territory, and the constraint of the top extension translates to slightly less air in my book, though it will likely mean easier to like and smoother in yours. We’ll get to why that may be in the treble section.

The Performer 8S has a very safe tuning, one that could be loved by many, especially if you are a newer audiophile making a serious first step into the hobby. I also genuinely feel sorry for those buying this as a first IEM, though. Finding a meaningful upgrade from here will be extremely difficult unless you are willing to spend double.

I also want to address the passive radiator system before we go into detail, since it is a highlighted feature of the 8S. The passive radiator has a vent that opens to the atmosphere from within the shell, and AFUL states that switching between open and closed modes produces audible differences in the bass response.

In my experience, I was unable to hear any meaningful difference between either state. AFUL is an acoustics company, and they did a great job with the 8S overall, but in my honest opinion, a meaningful, perceivable difference would need to be in the range of 3 to 6dB in the lower end, and this is simply not that.

Lows

The Performer 8S’s bass is fast, tidy, punchy, and agile. The presence is not at basshead levels by any means; it is a slightly elevated tuning, not a drastic one. If a track has prominent bass lines, you will be able to hear and track them excellently, but if the recording is lean on low end, the 8S will not artificially lift it.

This is a tightness-over-weight tuning that works well across a wide range of genres. The mid-bass is very clean with no congestion-prone warmth to speak of. If you found the Performer 5+2 a touch on the lean side, there is a good chance you will feel similarly here.

The bigger picture is that this moderately tuned low end is balanced by the restrained top extension, which together produce a very rounded, smooth, and coherent signature in return. It is a well-working recipe, and one we have seen AFUL execute before.

Mids

I really like the midrange of the 8S. Instruments and vocals are well-separated, there is no congestion anywhere in this region, and the perceived detail retrieval is excellent.

Compared to warmer IEMs, the midrange sits on the leaner side of the spectrum, but I would not label it thin or digital. AFUL actually handle this balance very well, and this was equally the case with the flagship Dawn-X and the more affordable Performer 5+2. Not boxy, not chesty, not laid-back. Instead, a clean, linear, transparent midrange that delivers everything in the recording without modification or manipulation. As-is.

The upper midrange is tastefully tuned. The same everything-in-moderation philosophy present in the bass region applies here too. While it cannot be called polite outright, it is conservatively tuned to shave off some of the unwanted energy, achieving a smoother and more coherent presentation with homogeneous contrast across the spectrum.

Highs

Smooth, coherent, and gracefully restrained. The upper treble of the 8S is kinder and more polite than both the Performer 5+2 and the original Performer 8. AFUL chose to trade top-end air for lower treble energy this time around, and in my opinion, that trade works well in their favor.

Compared to both the original P8 and the 5+2, the 8S’s lower treble will sound more present, more forward in upper harmonics, and more detailed in attack and dispersion. This region, in combination with the clean midrange, is the primary driver of the clarity and resolution you will perceive from the 8S. The highs are non-invasive. Polite enough to avoid any brittleness, yet present enough to not shortchange the track’s reproduction.

The review continues on the next page. Click here or use the jump below.