I used the rack to stack my Krell CD transport, Conrad Johnson DAC, tube phone amp and pre-amp. I filled the hollow legs with sa
nd which helped the acoustics. The rack did actually change the way my system sounds. It seem to have taken some of the bloom out of the bass and gave it more air and transparency, but not in a bad way. However the rack is not very heavy and I will be changing out the really cheap boards. They are made of some sort of plastic material as best I can tell.
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