OX Amp Top Box OX System Overview 45
OX System Overview
Note: This chapter provides a general overview of OX features. Complete details
about all OX hardware and software functions are provided in other chapters.
OX is a reactive load, power attenuator, and speaker cabinet/microphone/room simulator,
and effects processor. When combined with a tube guitar amplifier, OX delivers album-
quality studio tones without compromise.
OX connects to the speaker output of a tube amp and features a variety of output
connections for interfacing with other audio gear.
Key Features
• Premium, no-compromise analog reactive load box and guitar recording system for
tube guitar amps
• Instant album-quality mic and speaker cabinet tones via front-panel RIG knob
• Get record-ready sounds quickly with expertly-placed virtual mics and cabs — no
amp miking needed
• Five finely-tuned guitar amp attenuation levels, from off to whisper quiet to full
band volume
• UA Dynamic Speaker Modeling emulates speaker drive, breakup and cone cry
• World-class Universal Audio EQ, compression, delay, and reverb effects built-in
• Selectable 4, 8, and 16-ohm operation
• Front-panel Headphone out for silent practice with cranked tones
• Balanced TRS line outs and S/PDIF digital outs for stereo recording
• Pair with OX mobile or desktop app over Wi-Fi for editing and saving Rig presets
• Fanless design for silent operation
Reactive Load
OX’s reactive load presents a dynamically responsive impedance to the amplifier’s output.
OX’s impedance varies according to the amp’s output signal, just as a real speaker
does — which makes the amp respond to a guitarist’s touch and a speaker’s tonal
characteristics as if a real speaker is connected to the amp.
Power Attenuator
The reactive load safely attenuates (soaks) a tube guitar amp’s high-power speaker
output so the amp’s power tubes can be pushed to where they sound and feel best.
When a guitar speaker is optionally connected, the amp’s attenuated signal can be
delivered to the speaker at different levels so the amp’s high-volume output can be heard
at lower volumes. Five carefully crafted volume levels are available. The speaker can also
be turned off for silent operation.
Tip: OX’s reactive load includes a safety load feature. When OX power is OFF,
OX presents a 16 ohm load at the FROM AMPLIFIER input to prevent tube amp
damage that could occur with an unloaded amp output.
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