KZ ZSX

I will try and keep this short. For what I paid for it, they sound amazing. Yes, I upgraded the cable, that made a difference. Ordered tips, hope to get a little more bass. I adjusted the supplied small tips and that did the trick. Ok, no deep bass, but what you get is the full range of bass and depending on your source of music, it is ok, but quality of the bass is great. The mids are the most forward range, Superb, but guitars at the start of rock music will sound a bit louder than than when the rest of the music kicks in. Treble is pleasant for the most part. On a few tracks the treble was barely harsh sounding, so yes, the least quality sounding range of the three (due to the least frequency range of the three) but great for $40 bucks. Final Verdict: Once you get the accessories that will push the price (for me) to $70, it still is a bargain if you like the signature armature sound of the many earbuds that have them. 4.4 stars. Recommended.

I have two nice over-the-ear headphones and now I just leave them in the drawer and only use the ZSX IEMs. Their precision and clarity is so much better than the headphones. Noise isolation is reasonable - I can still hear my wife when she call me (that's good) but much other noise is blocked out.
Customer service was good for me. I had a problem with one earpiece and Linsoul promptly sent a replacement.

Nice!! good sound, the cable is a little short, the plug is really ugly, R and L mark in cable is invisible. Eartips must be more technical, accord to the auric.

Loyal by Odesza

I bought these to use only sitting at my desk with a dac and the right side cracked and the ear tip fell off completely making them not usable anymore. I contacted Linsoul and they only offered me a 50% refund and said literally to "just buy another pair" instead of just giving me a replacement pair. Absolute joke of a company. I will not buy your products again if you can't even support your customers.

Throughout my two weeks of testing, I did an A/B testing with the ZS10 Pro and the MH750 (modded, 16 core copper cable). I used the included ear tips and the included cable.

SIZE/FIT (5/5)
In terms of size, I find these to be a bit bigger than the zs10 Pro. The ZSX has the best fit out of all of my earbuds.

ACCESSORIES (3/5)
Cable is a bit odd.

SOUND (5/5)
I've never been so blown away with a set of earbuds upon first impressions. I wouldn't say these are extremely bassy earbuds, compared to the MH755. I feel like the bass on the ZSX are more pronounced. Vocal and instrument separation was very notable with this earbud. They do a very good job of producing small details that I've only been able to experience on the Tin P1.
Compared to the ZS10 Pro, there is more clarity on the ZSX. The ZSX produce better results in the upper end. Both have a similar quality in the bass.
Compared to the MH750, the ZSX has better separation, but there's more bass in the MH750 in terms of quantity. Bass is more pronounced on the ZSX. Upper end is also more pronounced and clearer on the ZSX, but there were times when I experienced a little bit of sibilance, something I don't experience with the MH750.

Overall (4.6/5)
These earbuds are NICE for the price. Cable's a little wacky when it comes to how much these can get tangled up in a day, but the earbuds themselves are SOLID. If you are looking for a pair of earbuds to sit back and chill with, these would be my recommendations.

This iem is Harman tuned quite well. No bad peaks, no sizzling treble. The high end is nicely refined and especially compared to KZ's other offerings. The mids have nice texture and male and female vocals sound nice and correct. The bass is.. WHOA! Quite amazing considering the price and very satisfying. Well extended and not overdone and surprised me personally.. being a basshead. Amplified with an LG G7 Quad Dac and stock cable I was not impressed with the soundstage, however with the Radstone ES100 and a balanced cable, VERY nice. Impressive even!
I am not a fan of the cable as it is quite thin and unattractive.. no matter I replaced it with a nice balanced 2.5mm Linsoul HC-08 cable. MUCH better in both looks and sound.