Universal Audio OX Amp Top Box

I'm currently using this for a Marshall 100W model 1959 Plexi and a 100W JCM800 2203X.

As a recording device:
The speaker and microphone simulation, as well as the built in effects are excellent. But the box is missing a balanced line out to round out the package.

As an attenuator/load box:
Works very well when playing with no speaker attached over headphones, provided you have some good headphones.

Unfortunately when using the speaker the sound is severely muffled with normal bass but greatly diminished mids/highs. And there are only 5 volume options due to a stepped knob controlling the speaker output.

Overall a quality piece of equipment, but lacking the last few features that would make it truly great.

I live in an apartment and use the OX with headphones and it's an unbelievable tool for getting the most out of my tube amp at home. I also use it in recording setting without the speaker engaged to prevent microphone bleed and again it does not disappoint. Because of the OX I've gotten to become far more familiar with everything my amp, pedals, and guitars are capable of and I yet to experiment more with the different microphone and post effects available with the software. One drawback is that the cable that powers the OX is faulty and has the tendency to fall out because of a poor connection. Despite this, I would recommend this product to everyone. It's been a game-changer for me

I've been using Suhr reactive loads and Spear IR's for a while now but easy portability of sounds between studios led me to look at the OX. the quality of the simulations is superb as you would expect. I was initially worried that I might not be able to get "my 1265 cab sound" as currently you cannot add custom IR's. However, I quickly found a '65 preset and nailed the tone/cab I'm used to hearing. Room eq, Mic's etc are all excellent and the quality of effects - especially the reverbs are superb and very usable. Very little tweaking needed.

My only disappointment is the inability to connect to the Ox via an iPhone app (although manual implies this is possible) - It can only be done via iPad app. I always carry a phone with me, but would rather not carry a pad around especially live. Also I don't run El Capitan and the current software cannot support this. El Capitan is not that old so I'm disappointed by that decision. Overall software is pretty good on the iPad - fairly easy to navigate and call up/store presets etc

Overall - Superb unit - pricey but worth the outlay.