Just got a pair of Sennheiser’s Momentum TW IEMs in, and they do not disappoint, but their sound definitely caters to a certain taste/crowd. Allow me to explain.
Up until now, I’ve been experimenting with a few options due to a huge upgrade from an iPhone SE to an iPhone XS, and thusly the loss of headphone jack. I have a higher-end source for when I’m doing critical listening, but for my hour-long commutes to and from work, I want something convenient, functional, easy to live with and yet still at least decent sounding. With my iPhone SE, I was using my old pair of Westone 4 IEMs (not the 4R with the replaceable cable, so the Bluetooth replacement cables are not an option for me). When I upgraded my phone, I initially decided not to spend so much, so I picked up a pair of 1More Triple Driver LTNG IEMs and paired them with the best Comply tips that fit, but I was pretty underwhelmed by the sound, and lightning connector was handy, but I found that it also was a minor nuisance as sometimes it would have a flakey connection if my phone is in my pocket. Next thing I ended up trying were Scosche’s lightning to 3.5mm adapter with in-line controls and also a Janvvoo Bluetooth wireless adapter that I found on Amazon. The Scosche cable ended up having similar connection issues in my pocket as the 1More cable, but sound was of course WAY better than the 1Mores. There was also a more critical issue where incoming phone calls would put the Scosche out of commission until I completely reset my phone. The Janvvoo adapter ended up being the best overall solution, as it suffered absolutely minimal loss in sound quality over the Scosche cable while functioning flawlessly and with the added benefit of being able to take calls seemlessly.
All that being said, at the end of the day, I decided that I wanted to go fully wireless, and decided to go with the Sennheiser Momentum TW as they seemed to hit all the bullet points on technical specifications and supported codecs etc, while also having an available tip option from Comply (a personal requirement as I am prefer absolutely maximum isolation). I’ve spent a few hours so far listening to them and my opinion is that they are worth the cost, especially after a little bit of personal ingenuity. The stock medium silicone mushroom tips fit me best and sounded good, but lacked sufficient isolation for me. The Comply tips for these IEMs only come in one size, and turned out too small for me to get good isolation. I ended up coring out the Comply tips, inverting the stock medium mushroom tips, filling them out with the decored Comply foam and flipping the mushrooms back over them. With this, I achieved the isolation and fit I desired.
In acoustics comparison between these new Sennheiser IEMs and the 12+ year old Westone 4s, I would say personal taste comes into play before absolute technical performance because the Westone sound is SO much more laid back at the top end of the spectrum. There is significantly more air and brightness in Sennheiser’s tuning than Westone’s. Note that the much more forward highs do NOT come across as harsh, just much more forward between the two! The mids and vocals are very close, with the difference coming down to greater sibilance with the German offering. Upper bass/lower mids hit with slightly more impact as compared to the American presentation, but I would not describe either one as faster than the other. On the deep bass end of the spectrum, the dynamic driver Sennheisers hit harder than the balanced armature Westones, but neither IEM can be described as muddier or slower than the other. Finally, it goes without saying that the Westone 4 has many more tips to experiment with to adjust sound. I have not yet played around with the equalizer function in the Sennheiser companion app. As far as top end extension, I think I have to give that to Sennheiser, but it’s tough to separate that fully from the more airy overall presentation. As for bass extension, neither of these IEMs are challenging full-blown cans, but I call it a draw.
-Ed