For sale: my Universal Audio OX Amp Top Box Attenuator in excellent condition.

This is one of the best solutions available for getting the full tone of a tube amplifier without having to play at extremely loud volumes. You can connect your amp to the OX and let it run in its sweet spot while controlling the volume, or even play silently using headphones or line outputs.

Besides working as a reactive load and attenuator, the OX includes high-quality speaker cabinet, microphone and room simulations, all controlled through the Universal Audio app. This makes it possible to record directly or play with a very realistic amp sound without having to mic a cabinet.

It’s an incredible tool both for home playing and recording, and works especially well with classic tube amps such as Marshall, Fender, Vox, etc.

The unit is in mint condition (only used 2 times at home), fully functional and always well taken care of.

It includes the power supply and documentation.

As always, I’m happy to show the unit over a video call before purchase, so you can see everything clearly and feel completely comfortable before making a decision.

Shipping at buyer’s expense or local pickup in Barcelona.

No trades please, sale only as I’m reorganizing my gear.

Feel free to reach out if you have any questions.