I have substituted the Akiko Triple AC stick for the standard AC stick, and the results are transformative. The realism of vocals and instruments, especially acoustic I find breathtaking. I have not noticed any high end reduction -- perhaps some "sandpapering" of rough edges in the treble. I recognize others experiences vary, but I can only say I am a believer.
I also would observe that it took a few days for the Triple AC stick to settle in, with the sound improving noticeably from when I first inserted it in my power conditioner and then took it out to hear the difference. I can only speculate that there may be a "burn-in" period with this device as we often encounter with IC's and power cords. My advice would be to insert it and leave it there for a few days, and then withdraw and listen for the difference.
Neal
I also would observe that it took a few days for the Triple AC stick to settle in, with the sound improving noticeably from when I first inserted it in my power conditioner and then took it out to hear the difference. I can only speculate that there may be a "burn-in" period with this device as we often encounter with IC's and power cords. My advice would be to insert it and leave it there for a few days, and then withdraw and listen for the difference.
Neal