Yes I read it in the user manual. I am charging now my UP4. my meter shows it is charging at 0.3A / 5.10V . UP4 charges slowly. I am trying to get the best settings to use the HWA/LHDC codecs...

Charging with 1 amp is weak, with a computer, very weak. Try a usb Anker IQ charger, they work well.

Hi, I do have AS10 and AS12 We know that AS10 & BA10 have the same drivers, they should sound very close. And AS12 has the reputation to sound better than AS16. When I listen to them, AS12 has a different sound than AS10: AS12 bass are stronger, overall sound is even more pure, clear & detailed...

I do agree, ED-16 shows more details, it is also named ZS7.

ZSR is a big old one from the times of the ZS6 ZSN is brighter than ZSR, if you need more resolution & level in the highs and overall, try AS10 (all BA)

ZSN is much better in every way !

ZS3 was a cheap post ATE single dynamic driver KZ earphone, I paid it at this time 8$ this was about half the price of the ZST that had one more treble BA driver. ZS3 has "big bass", warm natural voices, but very few details and no real trebles. There is a ZS4 that adds a BA for trebles, but is...

# For me ES3 is not well tuned, mediums do not sound natural (ES4 sounds very natural) # I do have AS10 (all BA) very good overall detailed sound, bass very pure and of good level, trebles a bit low level for me, but probably good for young people # ZSN very very good for a two drivers. bass...

I do have AS10 and C12, both are great. Maybe C12 has more puch in the bass and AS10 has low level trebles. Is it worth trying the AS12 (I know AS 12 has two bass BA when AS10 has only one and AS12 treble level is higher than AS10) Thanks for your advice.

Hi, you can easily find on AliExpress good balanced 2.5mm cables with C pin. I believe you do not need a big heavy cable to inprove the sound. I baught a KBear silver plated 2.5mm at 12€ for my C12, very satisfied with the build and sound ! https://fr.aliexpress.com/item/33039772804.html

Hi, I have the ED16, very good and neutral sound, I find that CCA C12 is a good step above and I recommand it to everyone. Just fit triple flange tips to increase the bass level, then it is perfect !

I agree, I do have the ED16 that is great (but more sub than bass, sounds a bit flat except with bright source) C12: Out the box, I found the bass level low, but after some burnin and replacing startips with small triple flange, bass have an excellent level.

Hi, I do use now the C12 with triple flange tips, it improves the sound for me: more bass, mediums a bit softer. with the starlines, I feel the bass level too low. With triple flange & the balanced silver KB EAR it sounds very good and detailed

I received recently my C12, details and instrument separation are good, but bass level is low compared with recent KZ. I did the tests on audiocheck.net, I did invert one cable side too, and the phase seems good. Now, I try continuous burn in. I did too the binaural test at...

CCA C16 has: bass: 2x BA #2955 (as AS12 and AS16, AS10 has one) medium: 2x BA #29689 (as AS12 and AS16, AS10 has one #296898) treble: 4x BA #30095 (AS10 has two, ZSX & C12 have one, AS12 has 2x#30012 AS16 has 4x#31736) KZ says: "Compared with the classic 30095 high-frequency Balanced Armature...