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Since I don’t like black filter and feel it become agressive bright, slightly sibilant and a bit unbalanced, this review is all about red filter but black filter sure add more treble energy and bite which might please treble head. There is great texture in the sub-bass and it’s quite energetic and goes quite deep to fill your cups with a smile . In tracks like: "Anchor - Trace Bundy" and " Ruby Tuesday - Franco Battiato" you seem to miss out on the desired experience of the midrange quite a bit.
Despite the semi-open design coupled with a vented DD, isolation surprisingly is still above average for me — and I never experienced any driver flex whatsoever.The two earphones share almost the same tuning with the FD5 ( review) being a touch more prominent in the upper mid range, a difference that is almost ironed out when we fit the FD3 with the "black" sound tube. The inclusion of the MMCX tool is extremely welcome, and in my opinion other manufacturers should take a page from FiiO’s book here as it makes life significantly easier when changing cables. FiiO FD3 IEMS vs IKKO OH1 Meteor (110 USD vs 140 USD) - Meteor is the first basshead IEM I am comparing the FD3 to, and this comparison is actually quite easy, because FD3 has more detail, and more resolution, as well as a slightly more comfortable fit and design than OH1 Meteor.
The unique celluloid panel is covered with Z5D film coating glass for a pure yet fresh transparent look and the aluminum-magnesium alloy of the body makes it exceptionally light, making it easier and more pleasurable to carry around. Tough the Moondrop Aria feel from another league to my ears in both technicalities and tonal balance, its cold mature tonality (with sub bass twist) might not be as appealing as more energic and fun V shape of FD3.It's impressive how Fiio has considered the upgrade path for E7 DAC owners by integrating an iPod-style dock connector into the E9. Fiios commitment to the end user experience shows as even their base model of the FD3 includes a premium accessories package that you would not expect. The FiiO FD3 offers a pretty ergonomic cylinder shaped monitor design, which makes it ideal for the use for longer listening periods without to hurt my ears that has an ear concha with an average size. As well, if you need even brigther presentation, the extra tuning filter will deliver you this extra treble bite.
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. While both the FD3 and FD3 Pro have the same cavity design and structure, the only difference between the two is the included cable. The new shell looks equally good, outshining the FH5 and FH3, even if some might find the FiiO FD5 a bit too glossy. The balanced filter does such a great job evening out the treble some might actually miss some of that accentuated treble sparkle of the previous earphones. 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.
The FiiO FD3 has a nicely airy, bright and detailed treble presentation with a good sense of control, even with the black sound tuning tube that gives a slightly boost to the lower and upper treble regions. In addition, the cable features left blue and right red markings for convenience as well as interchange audio plugs, allowing you to freely switch between 2. MMCX connector are all metal and very very thigh, to the point it can be confusing how to easily disconnect it.
Treble: The FD3 has a fairly good treble response for a single DD IEM, and is in general just a bit on the bright side though remaining quite smooth (on the bass nozzles at least). The FD3 came in a rectangular fancy looking black box with that features the product illustration in form of an iridescent (shimmering) drawing on the top along with some Hi-Res Audio brandings. 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. PS: I wanna thanks FIIO for sending me this review sample after my request as well as for being an audio company that accep critical listening review.The monitor sports a protruding part with the MMCX (Micro Miniature Coaxial) female connectors on the top and the unique semi-open acoustic opening at the bottom. Mids and bass for the most part are not too affected with the filter change but it does affect their tonality to be slightly brighter to warmer depending They both come with two sets of tuning nozzles, one with a thin diameter of the mouth (red) and the other with a wide diameter mouth (black).
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