The OX Amp Top Box is an analogue reactive load box for tube guitar amps, allowing you to easily play and record your tube amp anywhere and at any volume.

The unit features UA's impressive Dynamic speaker modelling, emulating both speaker breakup and cone cry. As well as this, you will find ’s EQ, Compression, Delay and Reverb effects.

There’s a whole host of mic and guitar cabinet emulations onboard, all accessible using the six-position “RIG” control (which is found on the front panel).