Passive preamps sound leaner because you are trying the wrong technology. Resistive attenuation is the WRONG solution. Transformer passive or TVC is the RIGHT solution. No leanness there. It only makes sense technically.
BTW, driving DAC to amps directly is the BOMB! However, doing it balanced and using the Final Drive is significantly better for SQ:
http://www.empiricalaudio.com/products/final-drive
Steve N.
Empirical Audio
BTW, driving DAC to amps directly is the BOMB! However, doing it balanced and using the Final Drive is significantly better for SQ:
http://www.empiricalaudio.com/products/final-drive
Steve N.
Empirical Audio