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Build and Fit
I must say that the FX15 is quite impressive in terms of its build. The way it feels in your hand is simply fantastic and it is designed to be reliable even for prolonged use. The overall design is sleek and clean, which adds to the charm of this piece of technology. You can see inside the smoky shells, and all the drivers and cables are tightly packaged and organized. The cable also has a high-quality feel to it, with good flexibility and tensile strength.
The FiiO FX15 is designed to fit most ears comfortably with its round shape. Unlike previous models, this design offers a smoother and semi-custom fit. It’s ergonomic and complete for a Universal IEM.
I found that the provided silicone tips were very effective, even though I typically prefer foam tips. The reason for this is that it fits perfectly with the silicone tips, so I don’t need foam ones to achieve a comfortable and secure fit. The silicone tips provide sufficient isolation, but if you desire more, foam tips are available as an option. My favourite has been the SpinFit tips with the FX15.
The IEM also feels quite comfortable and I did not feel any pressure. The isolation is not the best of course, given the air vent for the DD, but it’s still good. Overall an excellent and very comfortable fit experience.
Sound Quality
The FX15 is an IEM that produces a technical and neutral-ish sound, with a good balance and sense of space. Its high resolution, transparency, and separation ensure that every note is heard clearly. The IEM is mostly balanced, with a slight bass warmth that adds a punch to the sound, and treble crispness which opens up the presentation. It also provides good clarity and spaciousness, creating a realistic and enjoyable listening experience with a nice tonality.
The FX15, while being nicely balanced, also carries a dynamic and bright approach in the treble range. The EST drivers shine through and through, and it might be the most open and crisp-sounding IEM FIIO has ever released.
Bass
The FX15’s bass is impressive, boasting a powerful and deep sound that is well-controlled and textured with a satisfying decay. I believe it would satisfy many bass enthusiasts out there, even though it mostly focuses on the treble range. What sets it apart from recent FIIO models is its sub-bass texture, which remains quick and responsive even with heavy impact. Overall, the FX15 is a great choice for anyone who values impactful sub-bass.
It’s an enjoyable response with lots of impact and texture, although it doesn’t have the flat and quick character of a reference unit. My personal preference is for the “balanced” tips when using this IEM, as they offer the most authentic bass presentation in my opinion. While the bass tips do add more weight and lift to the sub-bass region, resulting in a meatier and more impactful bass, it can also throw off the balance and realism of the IEM. It’s not a major difference, but it’s comparable to adjusting an EQ – you get more kick and rumble with the bass tips. Ultimately, I would choose the balanced filters for a more well-rounded listening experience.
Mids
The FX15 gives very clean and smooth mids with good transparency and resolution. The mids sound coherent and it also has a good body and note thickness. Timbre-wise this is quite accurate and realistic, and there’s good warmth in here. However, the single BA struggles a bit to give the most correct timbre at times. The upper mid-range in particular is a bit shouty but other than that, the mid-range is very good. The resolution and clarity in particular are fantastic for the price.
I find the FX15 to possess good mid-range qualities with delightful transparency, well-balanced mid-bass, tonality, and dynamism. The mid-range is notably silky and effortless, with remarkable air and separation, which is a testament to its technical prowess. Moreover, the FX15’s musicality is impressive, as it delivers an authentic and natural timbre that is pleasing to the ear. Notably, the precision of tonality, particularly for instruments, is very satisfying. The tonality is not %100 natural in terms of feel and emotion, but in that case, it needs to be as good as IEMs that cost 2x or 3x the price, which is not fair.
leo
how it compare vd bgvp DM9 1dd 4ba 4est ?
MR FRIPP
To be honest I don’t understand why this IEM is in your recommendation list considering cons like “The mid-range is not the best part or Treble can be fatiguing over long periods of listening”. I almost bought this iem but headfi fi the reviewers don’t rate very well the FX15.