PhonoPhi
Headphoneus Supremus
Have you compared with AS12?Superb. Hidizs AP80 Pro X > Fedai 2.5mm balanced cable > BA10. The best BA bass I have heard as well!
AS12 still offer the best BA bass (judged on its own) to my ears with those two older Knowles-like bass BAs (as retained in AS16 pro).
BA10 are definitely the most balanced, still seem to be the most balanced KZ all-BA set.
A cursory glance at this it sounds like KZ and others are recommending using impedence adapters much like they do in the microphone world..
All because of the miniscule impedence of all BA IEMs..
At your own risk
Tried this tonight. I knew there is a quality opamp at the Line output stage of my DAC the D10. I've been using a Gershelli Headphone amp with the Topping D10 and sick of the wires and everything. Guess I'm not a amp stack guy . And what's more I have the Gershelli amp on it's lowest output on my ASF at minimum on the dillio. So, I cut out the middleman and connected to the D10 Line Out directly to my ASF. Just amazing. Listening comfortably at 28% volume. Gorgeous details, everything is there--a very present immediate sound.
Very interesting!
So using 100 Ohm output impedance produce pleasing results. From the measurements posted, the mids, especially upper mids at around 1 kHz are more subdued with adaptors for the more fun V shape (?)
KZ still needs to work put "their mids", in my opinion.
I have a caboodle of impedance adapters. I did not find them improving the sound before for me, but possibly I have not used the right sources.
Then a good option to consider as an extreme of impedance adaptors is a simple volume control box, which typically uses a 1 kOhm variable resistor, so you can vary resistance and attenuate the fun factor