ddHiFi Janus (E2020A) Review



For the nitpickers and nerdy ones here, I’m giving the specs and technical sheets. For all the others, you can just go to the next page to see how the ddHiFi Janus performs.

Dynamic Driver + FPCB 

Unlike most IEMs I reviewed recently, the ddHiFi Janus enjoys a single dynamic driver. No hybrid design, no multi-BA configuration, just a sole – proprietary – driver.

That said, the brand introduces some cool features that make the Janus worth or your attention.

First and foremost, the E2020A doesn’t come with a traditional circuit board fitted between the socket and the driver. Instead, ddHiFi implemented a Flexible PCB, tightly sandwiched between the copper connector and the driver.

Visually, it’s pretty impressive and makes for a super neat design, where the driver and the plug sockets intertwine in a beautiful hourglass form. On paper, it should ensure some circuit optimization, thanks to direct wiring. And, as a matter of fact, reduce the overall form factor.

Last but least, the ddHiFi Janus doesn’t come with a single vent, like most DD IEM. The engineers behind the ear fitted no less than six holes on the front cavity and a few more on the backside.


Let’s see if that makes a difference.


Comfort and daily use


The Janus as good noise blockers, but definitely not the best.

If they are more than adequate for places like my office or a crowded room (even if not everyone respected social distancing), they didn’t stop the sound coming from the train while I did my weekly commute.


In that regard, I may suggest you add Comply Foam tips to your Janus, if you want to use them in really noisy spaces like a train, a subway or a train.

So, time to check the specs!


Unlike the vast majority of ears I tried out recently, the ddHiFi Janus doesn’t get a semi-custom shape. Instead, the brand chose a simple, and proven, tubular design.


Thanks to that, you can wear the E2020A with the cable hooked over your ear, or hanged down like any « consumer-grade » earphone.

Whatever your choice, the IEM fitted my ear pretty well and felt pretty comfortable, even a two hours commute. If some might prefer this type of fit, easier to plug in/out, I’m more confident with customs and semi-customs ears.

But, that’s a personal choice and my wife begs to differ, favoring the Janus for their shape, over models like the Shanling AE3 I recently reviewed.

Full specs

  • Type : IEM
  • Style : Dynamic Driver
  • Driver: 1x Dynamic
  • Socket : MMCX + 2-Pin
  • Cable : octo-core OCC multi braided
  • Shell : acrylic + steel
  • Frequency Response: 20Hz – 20kHz
  • Impedance: 32 ohms
  • Sensitivity: 97dB/mW
  • Cable length: 120 cm
  • Price: $199

he article continues on Page Three, after the click here

4.3/5 - (60 votes)

A nerdy guy with a passion for audio and gadgets, he likes to combine his DAC and his swiss knife. Even after more than 10 years of experience, Nanotechnos still collects all gear he gets, even his first MPMAN MP3 player. He likes spreadsheets, technical specs and all this amazing(ly boring) numbers. But most of all, he loves music: electro, classical, dubstep, Debussy : the daily playlist.

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