I once owned the 6.3s . All in all very nice speakers. The treble sometimes got a little hot.The speakers never sounded dull.But this may have been something else in the setup..who knows. Silver does have a positive effect on the Sols. Just stay away from silver clad copper hybrids. It makes the speakers sound a tad thin IMHO. I don't like using cables as tone controls ..so YMMV.
If something doesn't work for me. I just sell it and move on.
If something doesn't work for me. I just sell it and move on.