Same DAC chip, but different amplification circuits. Would be interesting to compare them head on to pinpoint the differences that variable is making.
Exactly!
I have UA2 with Rico amps - surely unique; and Fosi HD3 pro with SA927 - definitely a brutal side of the implementation of 9038, and ESS in general ( I was really looking for "brural", and am very happy with it for comparative purposes).
K3A has OPA (1612?).
So amps are definitely more of an influence since in a chain they are close to the ears (a simple good rule).
But then DACs matter as well, since the very least they have standard implementations.
For DAC chips, I realized AK with it "velvet" sound of upper-end chips is really not my cup of tea (had to return Hidizs S9, could be defective though) and budget AK series feel really plain...
I have quite a bit of CS43131 implementations (three Tempotecs, DC04), love the low background and power, yet some "sterility/overcleanliness" is there to my limited taste.
My CS43131-based favourites are E44 and BHD (I love the soft implementation of BHD by the contrast, it works great for me with all- BAs and cheerfully V-shaped IEMs).
I am more of an ESS fun, perhaps an acquired habit (my good old DAP based on good old 9018), love BTR5.
So now I am looking for one more 9038 implementation - likely Hidizs S9 pro ( I could not find their amps, likely ESS-based(?)) or possibly
YIN LU MEI S3lite SE1- not much information is out there in addition to S3lite/SE1 confusion. So if anyone can chime in on
YIN LU MEI S3lite SE1- that would be great.