Alex is incorrect and he has accepted the same as a result of my measurements. Here is LPS-1 output with its included switchmode supply: This measurement (in red) shows that using LPS-1 adds substantial amount of AC mains leakage into your audios system. This is because the mains leakage through its switchmode supply is "common mode" and bleeds right through the DC power of the LPS-1. I then powered LPS-1 using my linear lab power supply and naturally, that mains leakage stopped. Importantly that only gets you back to square one. That is, using LPS-1 with your DAC actually degrades performance of the DAC. If you use a linear power supply, then it does no harm. But it does no good either. This same message exists for ISO Regen. Addition of yet another power supply and a switchmode one at that when using these devices is a bad idea. Simple measurements like I performed were not done to see the problem prior to release, in some sense believing their own marketing material that they give to their consumers (i.e. impression of isolation). Note that the output switches on LPS-1 also have some leakage so other types of noise can also bleed through it. Note that the mains leakage is not an audible problem so my data does not back people saying linear supply with LPS-1 sounds better. The analog output of the DAC does not change with or without LPS-1. Only imagination of the person does. Save your money and if you are dying to spend it, buy a higher-end DAC. These tweaks unfortunately do not work.