When comparing Onkyo ES-CTI300(BS) vs Sennheiser HD 58x, the Slant community recommends Onkyo ES-CTI300(BS) for most people. In the question“What are the best ~$150 over-ear headphones with a removable cord that are comfortable to wear all day?” Onkyo ES-CTI300(BS) is ranked 3rd while Sennheiser HD 58x is ranked 4th. The most important reason people chose Onkyo ES-CTI300(BS) is:
This feature helps provide comfort even with long hours of use, and since memory foams does not shrink overtime, you would be able to experience the same comfort for years.
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Pros
Pro Memory foam ear cushion
This feature helps provide comfort even with long hours of use, and since memory foams does not shrink overtime, you would be able to experience the same comfort for years.
Pro Easy to pack
These headphone's earcups can turn 80°, which is quite handy: they can be folded flat and makes it easy to pack them during travels.
Pro Low headband clamping force
The clamping force produced by the headband is just enough to keep the headphones in place,
gently pressing the soft memory foam ear cushion against your ear providing maximum comfort even when used all day.
Pro Great value
The HD 58x compares favorably to much more expensive headphones.
Pro Efficient
An amplifier is not required for these headphones to be enjoyable.
Pro Easily replaceable componentry
The Sennheiser HD 600 series of headphones (which these are a member of, despite their naming) feature tool-less disassembly. There's also enough availability of replacement parts that it's financially worth considering if anything ever goes wrong. Compare this to something like the Sony MDR 7506 where replacement drivers for the headphones cost $120 while the headphones themselves cost $80.
Cons
Con Clamp force might be a bit much for some
All day comfort is going to be different for different people. The pads are really comfortable, but depending on how sensitive your jaw is, it's possible you'll find these too tight. If you can find a store or a friend that has a set of HD 600 series headphones (think HD 600, HD 650, HD 660, HD 660s, HD 6xx, and these) see if you can put them on your head and listen to them for a while to make sure that they will be comfortable for listening sessions longer than an hour.
Con Doesn't scale with amplification
Ultimately, a reason that a person might consider saving up a little longer and getting the HD 6xx (based on (literally exactly the same as) the HD 650) is that the HD 650 can offer up more different sounds depending on what amplifiers it's paired with. This is one of the things that makes that headphone such a good value. It acts as a conduit to a bunch of different sound signatures. That headphone also offers more clarity once properly amplified than these do. ALL OF THAT SAID: if you're not a supreme clarity nerd constantly looking for the next thing to bring you more of that sweet sweet detail, these will make you completely happy and you can just spend $160 on a pair of headphones that sound amazing from your phone and your laptop and never worry about spending even more to get the most of them. From that vantage, these are a great value.