As you know I am a member of Aliexpress since 6 months ago . I have a made a few purchases since then with mostly cheap audio products . I also do also a lot of looking at various audio products and also receive lot of messages from the site
One of the most interesting things I have seen so far with lots of very positive reviews in both the internet and YouTube was the very cheap KZ EDX in ear earphone or IEM that costs just 5.8 Eu directly frem the KZ Store in Ali
|from the product page |
After a few days of rather personal difficult situations i devoted some time o test it.
This is its box . the buds are separated from ithe cable for better protection
All the inside box in a short view. BUds with the standard middle tips, plus small and wide tips . Plus the cable .Plugging the cable was a bit difficult to me as it required much force and care .
The cable has been ordered with microphone . its very possible to use it with my smartphone instead from the other cables the plug uses a full plastic plug base below the wires. I finally after trying several times managed to plug it into the monitors
There are two info sheets inside one of them is the users guide and a guarantee sheet. It is completely written in English that is NOT typical wooden Chinglish but neither poor English! THis little guide is the best insider on audio i ever read reffering not only on how the noise effect into listening but also how long you can listen to high level sounds before having any ear fatigue , the burn in that is nearly not necessary but also on how this can be installed into the ears. These guys are using a very poor text language but they are very good professors . They requite to recruit a fluent translator
I cannot use the middle ear tips. They are too small to my ears and the sound is not only leaked but also lack of the essential bass . The wide replacement ones were very difficult to even slide into the earphones tube and finally i preferred to use a rubber foam replacement of T400 Comply clone. it was much easier to damp into the sound tube.
|The final connection!|
After this i started my review as below:
The First time listening with some music with extended frequency range on the Q3 player: sibilant
for total time of 10 minutes
Second time after 6 hours listening to the same song : not so sibilant ! (just burn in? )
Finally it was taken by my wife who for the first time thought faster on how it is put in the ear!
More experiments from the technicians view
Sound magic vs KZ using parallel listening that is listening to the same audio channel and using them AM bud in the left ear and KZ in the right : KZ sound is 15.2 db higher than the Soundmagic as measured later after recording them both via a microphone in my smartphone . The very highs are quite higher as also the basses
Here is a screenshot from the program without normalization. you see how huge is the audio deference. Describing that in terms of drawing with -10 to 10 where SM is only -10 and 10 for only KZ sounds are termed into point 8
By separate listening and adjusting the sounds to be in the same level , EDX has higher bass and higher trebles than the SM These sounds are extend to the higher part of the high band . Graphically this sounds as like this way
|Click for more |
The thick line shows the middle of the hearing that is the nose as you an see all the sound goes to the KZ with little more adding in the very high sounds Most times the bass difference is not so 'visible' to the ears.
verdict : Technically the IEM is quite good with near sibilant audio Concerning the price it is more than good . 4.5/520Hz was audible to me even if this so low frequency is not so easy always to be heard ! 20 Ha is the lowest frequency that a human ear can listen. This is the same with 40KHz The best ears can listen up to 20'K'Hz.
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