Plug into this reactive load box to push your tube amp into sweet distortion at any volume -- and shape your tone with Universal Audio's speaker cab models.Universal Audio OX Amp Top BoxGet the ultimate tone from your tube amp -- anywhere, at any volume. The Universal Audio OX Amp Top Box is a premium reactive load box, allowing guitarists to play and record their tube amp in its ideal sweet spots -- from the edge-of-breakup to fully cranked -- at any volume level, and with instant album-quality… read more