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Universal Audio OX Amp Top Box

The ultimate tone from your tube amp – anywhere, at any volume
Premium analog reactive load box – 5 finely-tuned guitar amp attenuation levels – Rig control for instant album-quality mic and speaker cabinet emulations – UA Dynamic Speaker Modeling with speaker breakup and cone cry – Selectable 4, 8 and 16-Ohm operation – Front-panel headphone out – Balanced TRS line outs – Wi-Fi control from mobile devices – S/PDIF digital output – Rated for amps up to 150 W (200 W peak) – Built for years of home and studio use that includes 17 speaker cabinets, eight close mics and six room mics, as well as studio-grade compression, delay, EQ, and plate reverb. And at least one easter-egg (looper via foot-switch).

“OX is pre-approved by the Landlord Associations of the Americas, EU and Japan.
And all of your neighbors.
Especially that lady in 2B.”


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Universal Audio OX Amp Top Box Demo

app info starting at 6minutes in

OX is a premium reactive load box and guitar recording system, giving you perfectly studio-miked amp sounds from your favorite tube amp. OX lets you play and record your amp in its sweet spots — from huge clean tones and edge-of-breakup to fully cranked — at any volume level, and with mic, room, and speaker cabinet emulations at the turn of a knob. Featuring Universal Audio’s breakthrough Dynamic Speaker Modeling, OX is the first system to accurately emulate speaker drive, breakup, and cone cry — making it the world’s finest speaker attenuator and guitar amp recording solution.

The five UA OX attenuation capabilities

Michael says “setting 5 = pretty minimal, setting 4 = -5db, setting 3 = -10db, setting 2 = -20db, setting 1 = -35db”
180125 manual says “Output Attenuation Amount: Six Steps (dB): 0, 6, 12, 24, 36, ∞ (speaker off)”
180220 manual says “Output Attenuation: Five Attenuation Steps and Speaker Off”