Hi dynamicdog 兄,
手工just ok, 2111 performance good by listening, however the test result not so good compare to the orignal one.
2111 result
Frequency response (from 40 Hz to 15 kHz), dB: +0.41, -4.36
Noise level, dB (A): -83.2
Dynamic range, dB (A): 80.8
THD, %: 0.021
IMD + Noise, %: 0.036
Stereo crosstalk, dB: -81.6
IMD at 10 kHz, %: 1.026
Your suggestion is good but much expenisve. 2粒111 加個單轉雙座,加2粒0.1uf - 1uf電容 should expensive than the sound card
I will try 2粒627 first, since I have 2粒 on hand.
Further improvement plan, may change the cap to OS-CON & add copper shielding on the chip.
Any different for 2粒627 & 2粒AD797 ?
And have you try the 637?
Have Fun on this sound card.
Happy4
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