FiiO FH1s Earphone

General Information

Drivers: 1 Dynamic (13.6 mm) and 1 Balanced Armature (Knowles 33518)
Frequency Response: 5 Hz – 40 Hz
Sensitivity: 106 dB (@1 mW)
Impedance: 26 ohm
Tested at: $70

Product Page:

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New Head-Fier
Pros: nice and rich kit
great case
excellent four core wire
decent box
Cons: a sound that does not suit everyone

I got acquainted with the headphones thanks to the HiFiGo store.
Great packaging.
Rich equipment.
Decent quality roomy case.
An excellent 4-wire, soft wire that is not prone to tangling.

The ears are made of plastic with faceplates, which are smoky in color.
Sound guides are made of metal.
The headphones are sitting well in my ears, there is no discomfort.


Low frequencies:
There is a noticeable lack of subbass, despite the decent size dynamic driver.
Midbass is present, the "fast" barrel is worked out well in some compositions.
In general, the bass is quite elastic, fast, but often there is a lack of revelation and mass.

Mid frequencies:
It seemed to me a little retracted, the vocals felt a little behind.
Guitars are heard, but are read rather poorly.
Not enough "fat", the lower middle as if not.
In general, this range seems rather flat (despite the frequency response graph).

High frequencies:
I must say a lot of them here, a lot.
They come to the fore.
Sibilants give little pleasure, for a long time you can’t listen to such headphones, especially in songs with lots of vocals.
photo_2020-06-22_21-20-38 (2).jpg

It’s hard to say what kind of styles fit, I mostly listen to heavy music, with fast styles, despite the fairly fast bass, they don’t really cope with my hearing, the HF literally fall asleep, pulling all the attention to myself. Perhaps they would come under slow instrumental compositions and rock ballads.
I would recommend a source with a "dark" sound to them. You can play with the nozzles.
In general, the headphones seemed to me “dry” and “lifeless,” and the 8-kHz hump can exhaust many.
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Otto Motor

Headphoneus Supremus
Pros: Well composed low end; no recessed mids; great clarity; excellent staging, imaging, and resolution; accessories; value.
Cons: BA timbre with very fast transients.
FiiO FH1s

FiiO FH1s Review – Another (Too) Perfect Day


The FiiO FH1s is a very clean and crisp sounding, close to neutrally tuned, analytical earphone with impressive resolution and staging but a somewhat clinical timbre.


FiiO (est. 2007) is a Chinese company that made themselves a name with good quality, affordable portable amps for iPods and iPads. In 2013, I purchased their now classic E12 Montblanc amp that plugs directly into the ipod/ipad’s 16-pin port. And while it is still running strong, FiiO have diversified into bluetooth and accessories, and they have, among others, produced some popular high-quality earphones. The FiiO FH1s is a development of their FH1 model and is their currently lowest priced model at $69. The company claims that FH1s features a “revealing bass, astonishingly clear mids and high, and truly lush vocals”. We’ll find out in a minute whether this is true.


Drivers: 1 Dynamic (13.6 mm) and 1 Balanced Armature (Knowles 33518)
Frequency Response: 5 Hz – 40 Hz
Sensitivity: 106 dB (@1 mW)
Impedance: 26 ohm
Tested at: $70
Product Page:
Purchase Link: HifiGo


The FiiO FH1s features a relatively large 13.6 mm dynamic driver and a Knowles balanced armature driver. The accessories are truly generous with the content coming in a high-quality waterproof acrylic box. As you see in the picture, there are two different sets of silicone tips (S/M/L), and one pair of foam tips. I found the largest of the black silicone tips produced the best sound for me, the grey ones with the red interior were a bit boomy to my ears.

FiiO FH1s

The cable is connected via 2-pins with 0.78 mm spacing, it feels smooth and supple, and is just fine for my purpose. The shells are made of resin with some special celluloid faceplate, they are relatively thick (because of the dynamic driver) however light, and they appear to be well built. The whole assembly looks and feels as crisp and clear as it sounds.
Despite their size, the earpieces are very comfortable, the seal is good, and they are easily driven with my iPhone SE. I also used my MacBook Air with the Earstudio HUD100 (review coming soon) for my analysis.


My tonal preference and testing practice
My 80 test tracks explained

FiiO FH1s

The FiiO FH1s have a very clean, very homogenous, almost sanitized sound.
The bass is very linear, not too punchy, tight, composed, and the extension into the sub-bass is average. Overall, the low end is not overwhelming one’s eardrums but is rather realistic. A very clean and well-dosed low end. Very good!

Midrange vocals well sculptured, crystal clear, clean, a bit lean, breathy, and pointy (from the overtones handed down from the upper midrange peaks). Can be a bit harsh at higher volumes. The midrange clarity/transparency is amazing.

Treble is well extended, cymbals come in very clear, resolution at the upper end is also very good.

Imaging is excellent and so is speech intelligibility. Soundstage is wide and has a good depth, it is quite holographic and airy, with very good spatial cues. If you look at the soundstage as a room, then each element in that room, as well as the walls, are exactly and precisely defined. The distance between the elements can be easily measured with our ears. And the windows are open to let a breathe of air in. But this also brings problems with it. Separation and layering are excellent for this category. Note definition is great, too.
So what is the caveat? Something many will not even notice: the timbre! The sound of the FiiO FH1s is not the most organic one. It comes across as digital, like a CD player (and not like a record player or tape, such as in a single dynamic driver earphone). This does not matter for electronic music but it does for string quartets. Attack/decay are simply too fast throughout much the frequency range which makes the sound unrealistic. A piano sounds artificial and cymbals sound plasticky. Vocals could be more organic. The bass is not affected. This can be to some extent remedied by using a warm amp such as the ifi Nano BL, ifi Hip Dac, or the “analog” filter in the Earstudio HUD100.
On the other hand, this timbre works well for electronic music. I am getting used to the artificial timbre quickly, but this needs to happen every time I put them into my ears.


The $79 Tin Hifi T4 has a shallower soundstage, a bit more bass, lesser technicalities (stage, resolution), but it is more organic sounding. The $79 KBEAR Diamond single DD earphone is in stark sonic contrast with its strong bass and its organic timbre but lesser separation and layering capabilities. Clearly different strokes for different folks. You find several reviews of each on this blog [link]. In terms of imaging and resolution, I could not find anything as good in this price range.


In summary, the FiiO FH1s is like a high-resolution digital photo: super sharp, crisp colours, impressive, but overpixelated and therefore somewhat unrealistic for the purist – the old 35 mm slide, while nowhere near perfect, may appeal more to many eyes because of the more natural reproduction.
This is the good old glass half full/half empty situation: you get a lot of technical capabilities (and accessories) for $70 – even factoring in the cons. It is amazing how much prices have come down in recent years. Fans of electronic noise, pop, and rock will frolic, but purveyors of classical music, folk, and jazz, may have to get their ears used to the FH1s’ “exactness”. As always in life, every bright light comes with a strong shadow. In the end, it comes down to personal preference.

I expect the FiiO FH1s to attract a huge following.

Until next time…keep on listening!

Jürgen Kraus signature

You find an INDEX of all our earphone reviews HERE.


The FiiO FH1S were provided unsolicited by HifiGo – and I thank them for that. You can find them at the HifiGo store.

Our generic standard disclaimer.
About my measurements.
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