Hi Spanky, I am a bit confused with the layout of which op amp goes where. This is from your first post.
Opamp Swapping: (DAC [U5] - Headphone Amp [U6] - Result)
LT1364CN8#PBF --- LM4562NA/NOPB - Less shrill, more detailed bass, very low DC offset. Warning: The LT1364 is a high-speed opamp and may get warm or have potential to overheat. There are no reported problems but for those handy at DIY, a custom heatsink may be desired.
OPA627 ----------- N/A ------------- Clean and laidback. Great for grainy/bad recordings.
N/A --------------- AD823 ---------- Forward and in your face. Good for laidback or warm headphones. DC offset warning: 120/180mV
N/A --------------- LME49720 ------- Neutral and natural. DC offset warning: 120/180mV
Are the two colums supose to be under the DAC and Headphone headings on top? If so, I think the shift in visual alignment and all the dashes are throwing me off....can't help it, I'm an very visual person. If so again, would this work better?
Combination of DAC and Headphone OpAmps
LT1364CN8#PBF (DAC) and LM4562NA/NOPB (headphone) - Less shrill, more detailed bass, very low DC offset. Warning: The LT1364 is a high-speed opamp and may get warm or have potential to overheat. There are no reported problems but for those handy at DIY, a custom heatsink may be desired.
DAC OpAmp only, position [U5]
OPA627 - Clean and laidback. Great for grainy/bad recordings.
Headphone OpAmp only, Position (U6)
AD823 - Forward and in your face. Good for laidback or warm headphones. DC offset warning: 120/180mV
LME49720 - Neutral and natural. DC offset warning: 120/180mV
Anyway, great job on compiling all this data in one spot. Cheers.