RE 400 2 RE 400 HiFi


The Theory of Wooden Bucket
Also known as Cannikin law, indicating that the chain is only as strong as the weakest link. The wooden buckets; capacity is determined by the shortest stave.
The Look
Stylishly Fashioned In-Ear Monitor (IEM) with Silver Matte Body
Small and Compact

Replacement Silicone Earbud Tips of Various Sizes
Advanced Ergonomics for Superb Fit to Your Ears
Titanium Diaphragm, Neodymium magnet and OFC copper cabling
Premium materials Chosen for Optimized Performance
Effectively Reduce Stethoscope Effects
The Reference Earphone

Clear and Solid Mid-High with Clarity, Nuances and Abundant Details
Refined Bass Performance, Easy to Listen to, Non-fatiguing
Perfect Most Music Genres from Classical to Pop/Vocal


Frequency Response : 15~22 KHZ
Sensitivity : 102dB
Impedance : 32 Ohms
Cable Length : 1.33m
Plug : 3.5mm



I’ve had various In Ear Monitors (IEMs) over the years from stock freebies to aftermarket brands such as UE, Sennheiser, V-Moda, Sony, Bose etc. to name a few. I’ve never taken IEMs very seriously as they are supposed to be ‘fun on the go’ and they are normally played through cheap non-audiophile grade mobile phones or mp3 players. After a few months of little use they either get lost, damaged, given away or returned within the very first month. Unfortunately, I just cannot stand any IEM sticking inside my ears for more than 30 mins, at a time, regardless of how good they sound.

I was recently in the lookout for an IEM to replace my Bose IE2. The Bose IE2 was a fun IEM that I used during workouts and evening walks. It did not stick deep inside my ear canals and were really comfortable to wear for longer periods of time. It is a very cleverly designed IEM that was somewhere between an IEM and over the ear headphone by design and comfort. The sound from the Bose IEM is not the best I’ve heard and I kept them only because of the comfort they offered. The IE2′s cables started to wear out despite good care and it was about time to replace them.

After a lot of search and research I came across this Chinese brand HiFiMAN that is currently creating ripples amongst headphone audiophiles. I was initially attracted to their RE-Zero IEMs that were selling for as low as USD70 at Audio Advisor. They however had these small Stereo and TRS adaptors that kept me away from buying them. I then stumbled upon this new model – HiFiMAN Waterline RE-400. As of this writing, HiFiMAN has discontinued its older RE series of IEMs READ MORE: