$16 dollars. Keep that dirt cheap price in mind...
The best analogy I can think of to describe the sound of these IEMs is the the sound of 1980s moderately priced 3-way speakers which had passive crossovers and paper cones for the woofers and midrange speakers, and paper cone tweeters with small domes. Back then, the passive crossovers in such moderately priced speakers didn't control phase shift very well between the pair of speakers around the crossover point. In other words, okay sounding speakers which were sold to the vast majority of consumers, yet which would be barely tolerable to discerning audiophiles. Speakers of course have come a long way since then.
Yet the sound of 1980s moderately priced 3-way speakers in my opinion tends to hit the nail on the head in terms of how these IEMs sound. These IEMs offer volume with moderately clear bass and midrange combined with somewhat clearer treble, yet there is an obvious lack of truly good fidelity. My Moondrop Starfields sound better in all regards with exception of the power of the bass. The power of the base with the KZ EDX Pro IEMs is remarkable and is better than with the Starfields. Yet the Starfields have noticeably better fidelity, especially for complex tracks. Is this to say that the sound of the EDX Pro IEMs is not good? No, since sound of these EDX Pro IEMs is good for their very inexpensive price point. Nearly everything else tends to be garbage in this $10 to $20 price range, with very few exceptions such as the Moondrop Quarks.
There is some shoutiness in the treble which can become objectionable at high volume levels when listening to some tracks. Perhaps this shoutiness can be reduced by using filters?
I am keeping these $16 dollar KZ EDX Pro IEMs since their sound is surprisingly okay for the price, and since I don't care if I lose them or if they get damaged by rain.
My 4.0 rating is based on the sound versus price. Strictly in terms of sound quality, I would rate these IEMs as a 2.5 to 3, as in nothing is really bad, yet nothing really good.
UPDATE: These ZDX Pro IEMs have finally broken in. The excess shoutiness in the treble is gone, and overall clarity has improved in the midrange as well. I now rate these EIMs as a somewhat solid 4 out of 5, especially given the price.
