At one time I had the Equi=Tech Q1.5, the Walker Velocitor, the Reimyo filter, the Sound Application Line Stage, and the Loricraft power supply. I tried many different combinations. Since the Walker and the Reimyo both are Quantum based and the Loricraft and Equi=Tech both balanced, I thought that using one after the other would sound poorly. Any combination of the Velocitor and the Reimyo was worse than each by itself.
The Loricraft is current limited , but plugged into the ET did not sound bad. Not great either.
The Equi=Tech did not like being plugged into the Sound Application.
I think there can be many unfortunate interactions between these various technologies, and it can be very frustrating to try all of them. With the exception of the Loricraft which I use on my Shindo Labs/ Garrard 301 tt, I have sold all of the other filters, finding the IsoClean system with isolation transformers and a filtering box to be superior although expensive.