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Inside the app, choose between a variety of speaker cabinets in all shapes and sizes, including everything from vintage Greenbacks to Bull Dogs to small lo-fi speakers, each with a great graphic display. The OX really captures the speaker's unique breakup and cone cry.
Once you've chosen your cabinet, pick from a variety of microphones like a Shure SM57, Royer 121, Sennheiser MD421, or a vintage Neumann U67 to mic up the cabinet. You can choose up to three microphones at one time, each with their own parametric EQ controls, and individual faders to blend them to taste. You can also dial in how much "Room" tone you want, which will make you sound as if you are playing in a professional recording studio with a big live room. This can be adjusted inside the app, as well as the "Room" dial on the front panel of the OX. You can then dial in reverb and delay settings, both effects were designed by Universal Audio, and sound absolutely amazing, with tones of variety to cover any genre. Lastly, you can insert an 1176 compressor into the signal path, and it sounds great, it's the same 1176 plug-in as used on their UAD-2 platform.
On the rear panel of the OX, there are two line outputs, and a single S/PDIF digital output for stereo recording. By using the line outputs on the rear panel, you can send the sound of your tube amp through all the emulations available, directly into your DAW, or FOH at a live venue. Since the reactive load is sending an exact copy of your signal, this eliminates the need to mic your physical guitar cabinet. This would be great when playing a small room where even the natural volume of your amp is too loud before the PA, with OX, you could turn your speaker down to use as a personal monitor, then send the Line Out to FOH. The engineer will then have precise control on how to fit the guitar into the rest of the mix. In a studio setting, you could still mic your cabinet to get the true sound of your rig, but also record the line outputs of OX and experiment with different speaker cabinets and microphones. It could be a great way to add lots of depth to your guitar recordings, and same a lot of time by not having to re-amp, or replay the part with a different set-up. Every combination of speaker cabinet and effects settings you create can be saved and recalled inside the app. You can assign up to six custom presets to the "Rig" dial on the front panel of the OX, allowing you to easily pull up album quality microphone and speaker emulations, without dealing with the app in a live setting. The Universal Audio OX Amp Top Box is priced at $1299, which is quite a bit more than most reactive load boxes, or cabinet simulators like the Radial Engineering Prodigy V8, Rivera Rockcrusher, or Radial Engineering Headload V8. Yet, with the OX, you are truly getting your money's worth with all the extra features included in the app, and knowing that OX is using the highest quality effects, speaker cabinet, and microphone emulations available, all designed by Universal Audio. The OX is also really vibey looking compared to anything of its kind, it looks as if it belongs in a vintage recording studio. The maple trim and vented steel plate make it pop on top of your amp. The OX is completely silent, and has no internal fan, so it won't bother you while on top of your amp, or be picked up by a microphone. It uses specially designed heat dispersion, and even after being on for a couple hours, was barely hot. I highly recommend getting your hands on one and trying OX out for yourself, as I think they will become a staple in every recording studio and live music venue in a matter of no time.