Fiio q7
 

нравится, мой нынешний сетап.
очень детальный...


There are 7 different filters (internal configuration of the ES9038Q2M) built in the M11S for your preference.

Filters are the sound effects born with the chip, which only has slight adjustments for the sound. Here are some introductions to different filters. These are only for reference since actual listening also has something to do with the matched device.
1) fast roll-off,linear phase filter: Most Common filter with clean suppression and high rejection, best for music with high transients. Provides crisp clean highs
2) slow roll-off,linear phase filter: coherent and clear sounds, positioned near the middle. It is suitable for classical music.
3) fast roll-off, minimum phase filter: Minimal Pre- Ringing, preferred for Imaging and soundstage. No aliasing in frequency domain. Stronger bass than Linear Phase,clean highs
4) slow roll-off, minimum phase filter: Non-Symetrical filter designed to minimize pre-ringing. Strong punchy bass with good transient attacks
5) apodizing fast roll-off,linear phase filter: Version of Linear phase fast roll-off filter optimized to improve pre-ringing.
6) hybrid fast roll-off, minimum phase filter: Combination of Linear-phase and Minimum-phase. Fast transient attack, strong punchy bass, crisp highs.
7) brickwall filter: On of the earliest designs, intended for highest suppression possible,with high delay and pre-ringing.

fiio q7 2nd harmonic:

Second harmonic regulation:
It simulates the special distortion of tube amplifiers. The second harmonic that doesn't exist in the original signal is artificially increased.
Compared to level 0, level 1 adds more second harmonics. If comparing the numbers, the harmonic distortion is about 0.X% for level 2, about 0.0X% for level 1, and about 0.00X% when off.
Note: This function is only effective when the volume is high, for example: in high (or higher) gain mode, the effect will be more obvious when the volume is above 70.

Dear friend,

Filters are the sound effects born with the chip, which only has slight adjustments for the sound. Here are some introductions to different filters. These are only for reference since actual listening also has something to do with the matched device.
1) fast roll-off,linear phase filter: Most Common filter with clean suppression and high rejection, best for music with high transients. Provides crisp clean highs
2) slow roll-off,linear phase filter: coherent and clear sounds, positioned near the middle. It is suitable for classical music.
3) fast roll-off, minimum phase filter: Minimal Pre- Ringing, preferred for Imaging and soundstage. No aliasing in frequency domain. Stronger bass than Linear Phase,clean highs
4) slow roll-off, minimum phase filter: Non-Symetrical filter designed to minimize pre-ringing. Strong punchy bass with good transient attacks
5) apodizing fast roll-off,linear phase filter: Version of Linear phase fast roll-off filter optimized to improve pre-ringing.
6) hybrid fast roll-off, minimum phase filter: Combination of Linear-phase and Minimum-phase. Fast transient attack, strong punchy bass, crisp highs.
7) brickwall filter: On of the earliest designs, intended for highest suppression possible,with high delay and pre-ringing.
Just for reference since some users said they could not hear the difference.

Best regards