Fiio sent me the retail version of the EM3 to review a while ago. I’ve had these earbuds for over a year so I am quite familiar with the way they sound. They retail for $10.
Setup for this review:
Source: HP laptop running on battery and with wireless LAN turned off.
Media player: Foobar 2000 with full RAM buffering running in native ASIO mode.
DAC: LH Labs Geek Out 450 with 15dB to 18dB digital attenuation and FRM filter (Frequency Response Mode is a linear phase slow roll-off filter).
Headphones: Fiio EM3, Apple earbuds and earpods, Edifier H180, VE Monk, Blox BE3.
EM3 fit and finish:
Overall packaging is excellent. There is a unique code to verify that the earbuds are genuine. Three pairs of full foam earpads are also included. The connector is an L-shaped jack and there is a one-button microphone / remote (which I never used). The shell has the shape of a rocket exhaust nozzle. I am not a big fan of this design option: it’s not uncomfortable but the earbuds do not fit as snuggly as they would with something like a standard Sennheiser shell.
EM3 sound signature:
With full foams, bass is overly boosted and boomy, vocals are muffled, soundstage is very distant and tiny. Why on earth is Fiio including foam earpads in the packaging? Many people will put them on without afterthoughts and will be robbed of the sound potential of the EM3. If you intend to use foams, stick with Apple earbuds.
Without foams, tonal balance and clarity improve quite markedly. Highs can show some trace of sibilance. Bass is now snappy but lacks some weight (not a good match for EDM or rap lovers). Bass and treble extensions are nothing to write home about. Soundstage stays stuck between the ears (no outsized outward projection). Vocals seem a little bit recessed. The overall sound signature can be described as clean and neutral.
With donut foams, one could hope that this is the miracle solution that lands on middle ground between full foams and no foams but this is unfortunately not the case. The results with donut foams are much closer to full foams than without foams so the sound takes a turn for the worse. Since donut foams are not as sturdy as full foams they are also more likely to fall and get lost. This configuration is not recommended either.
I tried an easy mod to see if I could improve the sound of the EM3. With vents taped over and without foams, the soundstage increases dramatically but the treble gets boosted and vocals are pushed forward. The resulting sound is very fatiguing. With vents taped and full foams, bass is further increased but vocals are again pushed forward. The sealed enclosure gives a certain “boxy” coloration to the sound. The overall tonal balance becomes unnatural. In a nutshell, no luck on finding a quick fix.
Comparison of EM3 without foams to other earbuds:
Apple earbuds without foams and earpods:
This one is straightforward: except for build quality, the EM3 are simply better earbuds than the Apple ones.
Edifier H180 with full foams:
In many ways, the H180 sounds like what the EM3 with foams should have been: a fun v-shaped sound signature. The bass is elevated and a bit boomy but it gives more body to the sound. Treble is not overly refined but it's by no means harsh either. It is not as boosted as the bass and gives the impression of clarity. The form factor of the earbuds is extremely comfortable and fit snuggly against the ear concha. Edifier packaging, fit and finish is on par with Fiio. Price is also equivalent.
VE Monk with full foams:
This comparison is for the original Monk (now discontinued), not the current Monk+. The Monk is more mid-centric than the Monk+. Compared to the EM3, the soundstage is wider and vocals are more natural. There is a bit more clarity. Bass and treble are more extended. The cable seems sturdier and the use of standard Sennheiser shells makes the Monk more comfortable to wear. At the same price as the EM3, the VE Monk (and Monk+ for that matter) is the better buy.
Blox BE3 with full foams:
This is not exactly a fair comparison since the Blox costs about four times what the EM3 goes for. It is also a rather artisanal product with very limited distribution. However, I wanted to include it in the review to understand what the next level in quality brings to the table. The overall sound signature is relatively similar but clarity is improved and details become more readily apparent. You also get an easier sense of flow in the music, everything sounds less forced and more natural. These earbuds are a little more dynamic and better controlled.
Fiio EM3 review takeaway:
Were it not for the VE Monk, the EM3 would have been a perfectly acceptable product at its $10 price point. A much better option is looking into Fiio IEMs line-up which delivers excellent sound and really good value (much better than what Xiaomi / 1More has to offer at comparable price points, but that’s a story for another review).