One of KZ's classics are the KZ IE80, replicas of Sennheiser IE80. These earphones have a very balanced, yet warm sound. If you're not a basshead, and can forgive the lack of sub-bass in these, you will enjoy every moment, as long as you have a very good seal. You'll need to rotate the tuning knob to the middle (at least) to warm-up the sound signature, else it'll be too plain and cold.
Truth be told, they sound almost as good as the KZ DT5, only with a much lighter low-end and slightly brighter highs. Still, quite a rare find these days, and I'm not sure whether they are still being produced, but they're worth a try.
Pros
A very balanced sound with accurate mids, crisp highs and balanced bass response, especially the excellent mid-bass and low-mids.
The ability to control the amount of bass in the sound signature with a tiny knob is pretty impressive.
I find them comfortable to wear, but your mileage may vary.
The cable is detachable and has proper strain reliefs. It's also very soft and easy to roll for storage.
Cons
The bass isn't remarkably deep, and there's very little sub-bass, if any. Also, the bass might get distorted by extremely deep bass content (mainly in Trap music).
The housings have sound signature tuning knobs. Vibro Veritas confirms that these knobs increase/decrease bass response. The measurment was performed with both knobs positioned exactly halfway.
Comfort & Fit
I'm usually having a hard time with over-the-ear kind of earphones, but these proved to be quite comfortable. They hold just fine without any ear loops required and maintain a great seal. Still, this is a very individual experience.
Lows / Bass
The main drawback with these earphones is the lack of sub-bass, but many people will see it as a possitive thing, because these earphones provide a balanced/natural sound without overemphasizing the bass. Still, I wouldn't recommend these earphones for bass-heavy music because it might get slightly distorted.
Mids / Vocals
The mids and vocals are warm, crisp and precise. Vocal-oriented music sounds simply awesome. Acoustic instruments sound excellent.
Highs / Treble
Even though there isn't any unordinary microdetail, the highs are crisp, quick and precise.
