Conclusion

The ISN Neo1s are a prime example of how little you need to spend on a decent pair of IEMs these days.

They’re insanely light, comfortable, isolation is terrific, they look great & sound good by budget standards.

For USD $39 they’re the perfect backup pair of IEMs in case your more expensive set breaks, or just to throw in a gym bag without worrying if they get scratched.

Sonically bass is the highlight, vocals are quite impressive, they don’t sound claustrophobic and the drivers are fast enough to keep up. Treble’s a bit grainy, technical chops like resolution & imaging aren’t amazing but for $39 I have no complaints.

I’m a bit surprised bass isn’t even more dominant (they’re an ISN IEM after all!) but assume that was decided to keep them more neutral, so they work better as all-rounders. Treble prominence could be an issue if you’re sensitive, but they include swappable filters to tone it down.

I still recommend stretching your budget to the Neo5s if you can afford them, but it’s pretty amazing how much of their performance you get from the Neo1s for 13% of the cost.