10-02-2019, 07:10 AM
Hi Peter,
I also use the AMP2 (have 2 in use) for more than a year.
The reason for my decision of RasPi and AMP2 (or any other HAT amp brand) instead of using a DAC and an analog amplifier (or active speaker) is: You have a complete digital connection from the source to the speakers. With the exception of the low-pass filtering at the end.
From this point of view, the PSU can not affect distortion, noise, or sonic changes as long as the components are working properly and the PSU is stable under all circumstances.
But .... while I tested some PSUs, I heard some (very small) differences in dynamics that - I suspect - are related to the speed of power delivery. A laptop charger - as an example - can deliver 19V / 4.5A over a relatively long period of time. This is different than supplying high current for a short audio pulse!
I'm currently trying a capacitor block after the PSU and will report if it brings an advantage.
But in my opinion, we are discussing here at a very high level.
Best Regards
Norbert
I also use the AMP2 (have 2 in use) for more than a year.
The reason for my decision of RasPi and AMP2 (or any other HAT amp brand) instead of using a DAC and an analog amplifier (or active speaker) is: You have a complete digital connection from the source to the speakers. With the exception of the low-pass filtering at the end.
From this point of view, the PSU can not affect distortion, noise, or sonic changes as long as the components are working properly and the PSU is stable under all circumstances.
But .... while I tested some PSUs, I heard some (very small) differences in dynamics that - I suspect - are related to the speed of power delivery. A laptop charger - as an example - can deliver 19V / 4.5A over a relatively long period of time. This is different than supplying high current for a short audio pulse!
I'm currently trying a capacitor block after the PSU and will report if it brings an advantage.
But in my opinion, we are discussing here at a very high level.
Best Regards
Norbert
