Hi all, I bought the exact same class D amp based on Purify ET400 modules reviewed by @WolfX-700 here (https://www.l7audiolab.com/f/min400a/).
Problem: With certain specific tracks like the one below, the amp goes into protection mode and fails to output any sound for 1-2 seconds irrespectively of the source (different dacs, etc) or volume.
With 99.9% of the tracks, it works incredibly well.
Amp configuration: No buffer and no op-amp used in the input card before the purify modules. (Same as the one reviewed by Wolf)
Potential solution: Subsonic filter cutting off anything < 10Hz. Then, the problem is solved but I cannot always apply EQ, for example, streaming from Airplay certain tracks.
Request: Any help with intermediate board checks of modifications to stop it from oscillating? or entering DC protection? when <10Hz signals are processed. I am lost now.
Simple measurements of the amp using COSMOS ADC-1
Problem: With certain specific tracks like the one below, the amp goes into protection mode and fails to output any sound for 1-2 seconds irrespectively of the source (different dacs, etc) or volume.
With 99.9% of the tracks, it works incredibly well.
Amp configuration: No buffer and no op-amp used in the input card before the purify modules. (Same as the one reviewed by Wolf)
Potential solution: Subsonic filter cutting off anything < 10Hz. Then, the problem is solved but I cannot always apply EQ, for example, streaming from Airplay certain tracks.
Request: Any help with intermediate board checks of modifications to stop it from oscillating? or entering DC protection? when <10Hz signals are processed. I am lost now.
Simple measurements of the amp using COSMOS ADC-1