Well, I have no other experience with SoundMagic's IEMs.
This is my first one. It's the cheapest hi-fi IEM I've ever bought.
Yes, I mean it. It's high fidelity enough that I will not hesitate to call it HI-FI.
AND, it's cheap. It costs me $15 dollars here in Taiwan.
How good it is?
I measured it with RME babyface & condenser microphone. I used a small tube and some clay to emulate ear tube.
Here's the result:
It's FLAT! FLAT from 30Hz to 2kHz. It's great with-out question.
THD% across frequency:
It's LOW distortion and CONSISTENT ratio across most of the frequency which is quite hard to find.
For example, the pricy Denon C710 which costs many times of the small bud, didn't performs so well:
THD% of Denon C710:
Back to ES18,
Please note that the floor is -60dB, the ringing around 6kHz maybe caused by resonance in the tube. But it's still quite low after 2ms (under -40dB.)
Most frequencies decreases in unity, although not very fast.
Here's the plot till 18ms:
(It's background noise of the system after 10.83ms. )
It sounds great and also measured great.
For the price, I'd call it magic!
As for other aspect, the package is good, comes with carrying soft bag, three sets of tips. Good enough.
Though the seal & comfort is not best among the IEMs I've had.
The comfort is average, seal would be great if you use Comply Foam T400 with it.
Well...... I'll recommend it to anyone without hesitation. Even if you've already had many IEMs.