Very Good,with power adapter.

*SMOKEY SMELL*

From Universal Audio

“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 Audios breakthrough Dynamic Speaker Modeling, OX is the first system to accurately emulate speaker drive, breakup, and cone cry making it the worlds finest speaker attenuator and guitar amp recording solution.”