The frequency response of the DACs you have tried probably extends to 20Hz. The reason that you are not hearing the same bass as your vinyl system is likely related to two deficiencies:
1) Jitter is probably too high to deliver the focus required for good bass
2) Dynamic response in the analog circuits are limited by power supply/subsystem
Not all DACs have this problem and some DACs will have significantly improved bass dynamics by driving them with a low-jitter source.
Steve N.
Empirical Audio
1) Jitter is probably too high to deliver the focus required for good bass
2) Dynamic response in the analog circuits are limited by power supply/subsystem
Not all DACs have this problem and some DACs will have significantly improved bass dynamics by driving them with a low-jitter source.
Steve N.
Empirical Audio