To tube or not to tube? Strange as it may seem, that age-old question is still relevant. Today new materials and innovative designs have taken vacuum tube audio components to a higher level. When I first saw the Black Ice Fusion F100 in room 504 at the Capital Audiofest, they were powered with Russian Tung-Sol KT150 beam tetrodes. This innovative tube is only one type of power tube the F100 can use, each with a different musical voice.