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Universal Audio OX Amp Top Box Reactive Load Box

The OX Amp Top Box sits between a tube amp's speaker output and the room, presenting a reactive load instead of a cabinet so the amp can be run in its sweet spot at any listening level. What comes out is a recorded amp sound with the dynamics intact, not a line-level approximation of one.

Cabinet and microphone combinations are chosen with the RIG knob, with over 100 Rigs that can be auditioned, tweaked and saved from an iPad or a Mac or Windows computer. UA Dynamic Room Modeling adds the speaker breakup and cone cry that a real cabinet produces at the edge of destruction. It works with any tube amp rated at 150 watts RMS or less into 4, 8 or 16 ohms.

TypeReactive load box with speaker and mic emulation
Load Impedance4, 8 or 16 ohms
Maximum Amplifier Power150 watts RMS
RigsMore than 100 custom Rigs, auditioned and saved over Wi-Fi
ControlCompatible iPad, or Mac/Windows computers
ProcessingUA Dynamic Room Modeling, speaker breakup, and cone cry
Introducing OX Amp Top Box from Universal Audio