Joined in 2023 
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63 About this deal
Last time I reviewed the FiiO FD5, their dynamic flagship IEM, which stood apart from the FA9 (full-BA) and FH7(hybrid) by using a sole Beryllium-coated diaphragm. FiiO implemented the replaceable tuning nozzle in the flagship FD5 that is being followed here by the FD3 Pro.
The lower frequency region shows a great level of depth and body along with a nice breeze of warmth, the midrange on the other hand is slightly recessed due to the V shaped sound signature that sounds pretty crisp and transparent, while the treble area is fairly energetic, bright yet controller. While using the treble nozzle, I have found the treble to be quite peaky and harsh and hence I have used the bass nozzle throughout the review. Again, it’s very rare that FIIO offer poor craftmanship and in fact, it seem they work harder than ever to offer sturdy durability yet keeping the beautifull design approach. 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.
Unlike some other IEM with changeable nozzle filter, this one doesn’t get loose easily, which is a plus too. Venting seems a bit different where the new FD3 air vents are at the bottom of the mmcx connector housing while the FD5 uses venting on the back of the shells. The FD3 Pro is Hi-Res Audio certified, a testament to its excellent sound that is not only capable of reproducing delicate details, but also is exciting and a joy to listen to. This collection includes 9 pairs of silicone ear tips (Bass, Balanced and Vocal) and 2 pairs of memory foam ear tips.
The FD3 has a rounded body with a slightly angled and prolonged nozzle while weight is lower than the FD5, as a result the fit is just perfect, sitting tight in the ear without falling with head movement. As already mentioned earlier in my review the pro version comes with an upgraded 8-stand cable with interchangeable termination plugs. 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.Female vocal are more fowards, with better timbral balance, but male vocal are thinner yet again more clean-lean. The bass has most of its energy around between 35 Hz and 50Hz, having a very satisfying thumpy sound to it. The new FD3 is thoroughly musical, quite balanced and smooth, has excellent build quality, comfortable fit and a great accessory pack.
The sound nozzle has an “Interchangeable Sound Tube” design that we have already seen on the bigger brother FD5.The featherweight combined with the excellent fit make for a stress-free, comfortable user experience even after extended use.
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