◆ ARX Systems is a professional audio equipment manufacturer from Australia. ◆ This is a professional-grade, high-end stereo 1/3 octave 30-band equalizer. ◆ It is a 3U rack-mount size. ◆ The phase of the Cannon connectors has been changed to pin 2 hot. ◆ Although it is an older model, it has been stored in a rack case with a lid, so there are no noticeable scratches or stains. ◆ Everything works perfectly.