The Ultimate Ears 900 is the current top-of-the-line consumer earphones from Logitech. There is a high regard for the UE brand among the professional musicians. With a street price of above S$400, I could not resist getting the review unit to test for myself. Is it worth the price tag?

UE900 Specs:

  • 4 balanced armature – 2 for woofer, 1 mid-high, 1 tweeter
  • Impedance: 30ohms, 1kHz
  • Sensitivity: 101.2dB (50mW, 1kHz)
  • Frequency Response: 20-20000 Hz
  • Noise Isolation: 26dB
  • Cable length: 122cm
  • Retail price in Singapore: S$599

What’s in the box

  • Earphones
  • Protective Hard Case
  • 5 pairs of silicone ear cushions (XXS, XS, S, M, L)
  • 3 pairs of Comply┬« ear foam (S, M, L)
  • Audio Cable
  • Cable with on-cord mic and controls
  • ┬╝-inch adapter jack
  • Airline Attenuator
  • Polishing Pouch
  • User Guide


The UE900, driven by 4 balanced armature targeting at specific audio spectrum, is characterised by warm and cosy sound. The treble is laid-back and not piercing, making it a great listen at high volume. The mid-range seems to take centre-stage on the UE900, as the mid-range instruments sound more distinct than the treble instruments. The bass is not exceptionally heavy, but offers sufficient subwoofer feel. It does not give me the excitement as I listen to my usual reference tracks, yet I feel delighted to the sound it produces. As I spend more time on the earphones, I appreciate the balanced frequency response: not having overly-crisp treble means my ears can pick up more instruments from the mid-range. The best part is that you can EQ the sounds to your liking and the frequency response still sounds great without sounding unnatural.

I am not a fan of the ear-loop design, which makes wearing a little more laborious. The flexible ear-loop don’t seem to tuck nicely behind my ears – maybe my loop circumference is smaller than average ears. And the UE900 is possibly the most easily-tangled earphones I have ever reviewed, no thanks to the braided cables, though I have to say they add strength and durability to the earphones.


The UE900 is a relaxing piece of earphones to enjoy music, which does not wow the casual consumer except for those who prefers a slightly muted treble response. It is pricey for a pair of earphones that doesn’t give me the initial wow factor. I would expect a more impressive performance from quad-armature drivers, but nonetheless an extremely capable earphones that you could tweak to deliver the frequency response that you so desire.

Share your comments

This site uses Akismet to reduce spam. Learn how your comment data is processed.