Disclaimer Special thanks to Sennheiser for providing this opportunity to review the new Momentum 4 Wireless (or M4 from here on). I have not received any incentives for writing this review. All the comments are opinions of my own. I am not a professional reviewer, just a headphone enthusiast and music lover. Build Quality The M4 is built with mostly plastic materials. Although they do seem to be solid and they feel a little weighty when holding them. There is some padding under the headband so it doesn’t create hotspot on top of the head. The...

Overview First, I want to thank Audio46 for sponsoring this product tour. I don't write reviews very often. So I am just going to share my impressions and will keep my review short. Besides, there have been several very thorough and comprehensive reviews already posted on this thread. I will also provide some quick comparisons between the A4000 and some of my single DD IEMs, such as JVC FX750, Monster Turbine Gold, and Sennheiser IE80. I did most of the listening using the Chord Mojo connected to my laptop. The music sources include Spotify...