Joined in 2023 
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63 About this deal
The sound guide is long and located at an anatomical and correct angle; sound insulation is obtained at a very high level. The overall signature can be described as open, dynamic, vivid, engaging, clean, crisp, V-Shaped towards balanced, detailed and fun to listen to. Notes are nicely defined except the edges, which feel to have been having less extension or blunted. The bass character of the FiiO FD3 is in general pretty soft, warmish, well-bodied and entertaining. Mids are more open with the Autumn, more transparent and smooth with a timbre that is more organic and natural too.
However, the isolation is efficient enough for the use it in fairly noise environments such as metro, bus or train, while it is not suitable for the use on the stage. Bringing down the treble emphasis, this forwards the mid range and bass presence balancing out the sound and tonal qualities and that is what I am hearing from the FD3. The pin-point precision of machinery and the delicate touch only possible by human hands come together to create a phenomenal piece in the FD3 Pro. Similar to the FD5, the FD3/Pro is also equipped with an acoustic prism that will eliminate high frequency standing waves, while enhancing overall sound wave diffusion. The result is a driver with excellent sound quality and minimal distortion with the added bonus of being ultra-sensitive.The choice of cable is the only difference between the FD3 and the FD3 Pro: the standard model (which I received) includes a 4-strand single crystal copper cable with a 3. The cable is slightly tangle prone, but it does not conduct any microphonic noise, being a pleasure to use and to have with FD3. This design brings several advantages beside the improvements to the sound performance, such like hear protection by balancing the air pressure within the FD3 leading to less pressure on your eardrums. The bass has most of its energy around between 35 Hz and 50Hz, having a very satisfying thumpy sound to it.
Just think: in 2025 you will get campfire solaris for 400uss and planar iem like audeze euclid will cost 200uss. However texture and details are nothing out of the ordinary, and the FD3 is definitely going for a musical tonality rather than analytical prowess. The FiiO FD3 comes with a very rich package of accessories that includes a wide variety of ear tips collection. Female vocals have those wonderful highs but they extend not too much into the head-room hence they feel slightly held back. These MMCX male connectors are sitting pretty tight on the monitor and should last for years without any problem.Add to that, tuning switches on each ear, 3 sound adjustments, the longest sound-tube on any FiiO’s IEM, and here you have the best of FiiO’s engineering. Not only does such a design lead to more natural sound but it also effectively protects your hearing by balancing air pressure within the FD3 leading to less pressure on your eardrums. A clear and sonorous sound, but with a comfortable, soft and textured transmission of live instruments and vocals, it's incredible. The aluminium-magnesium alloy main body is made man industrial process combining five-axis CNC processing and hand polishing.
The midbass redion of the FiiO FD3 has a good sense of impact, depth and intensity, which hits nicely soft, without to sound dominant. The sub-bass had less energy than the red filter but the texturing is enhanced more and it felt more in line with the rest of the sound signature. A hybrid quad-drivers with a lovely magnesium-aluminum shell and punchy lows which made them pretty lively. My one complaint is that the MMCX cable connectors spin somewhat easily out of box, which gives me a bit of cause for concern regarding longevity.The new shell looks equally good, outshining the FH5 and FH3, even if some might find the FiiO FD5 a bit too glossy. Overall the size of the soundstage is not much above average, however I did find it to be much more spherical than most budget single DDs, with very good height. Like the FH5, its big brother, the FH3 gets a very cool aluminum/magnesium shell, that feels both sturdy and comfy, detachable cables, and most of all the S. Bass on the FH3 is somewhat leaner but cleaner, tighter, better controlled with greater dynamic impact and layering.
Bass is certainly fuller, weightier, more tight, better controlled and layered with greater dynamic contrast and impact. Their newest effort, the FD3, is our subject today, being the mid-tier entry in their line of single dynamic driver IEMs. I also tried switching to the treble nozzles, but I found the peaks in the upper regions to be rather bothersome as a result. Accessory pack is the same excluding the FH3 cable which is an old style design of worse quality while we consider the FD3 to fit more comfortably and securely in the ear. And with this combination i have thoroughly enjoyed the well rounded and full bodied mids blending nicely together with the bass and the highs.
The midbass area of the FD3 shows a better sense of speed and authority, while it is also more impactful, which is especially audible in complex bass passages. FD3 is remarkably good with pretty much any music style, and I wouldn't say that they lag behind with any style, even Rap and Grind sounding fun and even addictive with them. to reduce unneeded distortion yet also surprisingly light, allowing the driver to have excellent transient response. Thos 2 aren’t similar at all, the Aria being more U shape, colder and more neutral in it’s balance too.
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