I have one of these and used it in my previous system for a while, and it did affect the sound quality, but I've never tried it with my Naim kit, though I suspect the effect would be similar. I found it seemed to improve separation and made the high frequencies a little sweeter, I always want to describe the effect as a more 'airy' sound, but all this seemed to be at the expense of drive, energy and musical impact. I lived with it in place for about 6 months, then decided i didn't like it, something that was confirmed when I reinstated my trusty MK Duraplug. The Tacima does to give this sense of greater detail and cohesion, but the energy and impact of the music is just lost somehow, it's all too tip-toe-like. That said, I can well imagine people preferring the Tacima effect, it's all down to individual tastes and priorities, but with my old Cyrus kit anyway, yes, for better or worse, it did affect the sound quality noticeably. For £30 though, worth a punt if it might help prevent damage to your components, and you may well like the effect, it is at least intended to improve sound quality rather than damage it.
