When comparing Shure SE215 vs Sennheiser 4.50 BTNC, the Slant community recommends Shure SE215 for most people. In the question“What are the best headphones?” Shure SE215 is ranked 43rd while Sennheiser 4.50 BTNC is ranked 67th. The most important reason people chose Shure SE215 is:
The memory foam eartips mold to your ear to provide amazing sound isolation, though there's a bit of a learning curve to using them. You have to press them together before putting them in and then allow them to expand in your ear. Once expanded they will take the shape of your ear and that way provide excellent noise isolation. The earphones also come with silicon tips which are easier to use than the foam ones and also last longer.
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Pro Fantastic sound isolation to block out unwanted noise
The memory foam eartips mold to your ear to provide amazing sound isolation, though there's a bit of a learning curve to using them. You have to press them together before putting them in and then allow them to expand in your ear. Once expanded they will take the shape of your ear and that way provide excellent noise isolation.
The earphones also come with silicon tips which are easier to use than the foam ones and also last longer.
Pro Comfortable once you get used to them
The SE215 earphones have a negative profile, optimized nozzle angle, over-ear fit and memory eartips that ensure the earphones stay in place comfortably regardless of situation. You can even lie on your side with them.
Pro Rich, full sound
Bass is emphasized so there is a good bit of thump while staying controlled. Mids are rich, highs avoid sibilance, though they're a bit rolled off.
Soundstage is okay--instruments are separated out enough for them to not sound like they're all coming from the same place, but it's not particularly wide.
Pro Outstanding build quality makes them long lasting
SE215 earbuds use tough plastic earpiece shells, have a robust kevlar-reinforced cable, a sturdy Y-splitter that's difficult to bend and an L-shaped plug that adds additional strain relief. They won't break if you snag them, drop them or sit on them. They're also completely sweat proof so you can use them while working out without having to worry about damaging them. They're durable enough for professional stage use for which they were specifically designed for.
Pro Thick, replaceable cable
The SE215's 6.4-ft. cable is very thick, and further reinforced at the left/right split point. Reviews confirm the durability benefits of its heavy-duty design. If it ever does break, the cable is built to detach safely from the earpieces, allowing replacement.
Pro Two year limited warranty
Shure provides a warranty against defects in materials or manufacturing for two years.
Pro Will stay in place in the ears
The optimized angle of the earbuds, over-ear fit, and memory ear tips ensure that the earphones stay in place comfortably regardless of situation. These are also sweat-proof, so they're a great option for active use.
Pro Great mids and bass
The mids of the 4.50 BTNC sounds natural and clear. Music with a lot of vocals and guitars will definitely sound great with these headphones. The bass is not very powerful, but still provides a satisfying thump to the music. Overall, these headphones sound warm and laid back, great for casual music listening.
Pro Good battery life
The headphones can last around 19 hours from a full charge on wireless mode with noise cancelling on. When on wired mode, it can last 25 hours with noise cancelling which is pretty decent for its class.
Pro Can fold to a compact size
These headphones can easily fit inside a bag or purse, and should be easy to carry. The ear cups can fold up to the headband, reducing the headphones’ overall size.
Pro Decent noise cancelling
The active noise cancelling feature can reduce a good amount of ambient noise that may mix in with your music, though it doesn’t completely eliminate both high and low-pitched noise if they're loud enough.
Con Need some time getting used to
It may take some getting used to memory cables and there's a bit of a learning curve to putting the earphones in with memory eartips. At, first memory cables may seem a bit stiff, but after they're broken in, they're generally more comfortable than typical wires. There's even a wire sleeve that helps form the wire bundled with the earphones to help combat this issue. As for memory eartips--every time before putting them in your ear you have to press them together and then allow them to expand in your ear.
Con Inline mic and volume controls cost an extra $50
The supplied detachable cable does not have a mic or inline volume controls. They can be added by upgrading to the M+ cable.
Con Muddy treble
You may find the sound to be too laid back or lacking in detail. The high frequencies are slightly rolled off, so these may not be the best option if you love to hear the fine details of your music.
Con Strong clamping force
You may feel some discomfort on your head when wearing these headphones for extended periods. The clamping force is quite strong, and may give a pinching sensation on your head.