The HUSH IICX is a 2-channel rackmount noise reduction system made by Rocktron. It removes noise generated by guitars and effects units, achieving a clear sound without damaging the original sound. It also supports line input and stereo linking, so by using it on old sound sources with a lot of hiss noise, such as cassette tapes, you can master with less noise due to its natural noise reduction characteristics. I confirmed that the noise reduction functions by operating each adjustment section. This unit is an effects unit that removes high-frequency noise such as white noise. It is not effective for noise such as pop noise or power hum. Something that has been bothering me since I bought it: when the surroundings become quiet, the unit hums with the power supply frequency. I inquired about this with the seller, and they explained that it is normal because the power transformer is close to the top cover, causing the thick iron cover to vibrate slightly. Also, they said that there is no noise contamination to the signal due to this. The unit doesn't have a power switch, and it seems a bit different in taste from Japanese brand products. Just in case, even after running it for a long time, the power transformer was only slightly warm to the touch. It is currently working, but due to the age of the equipment, it is sold as-is, with no returns. ○ Power consumption: 5W ○ External dimensions: 482(W) x 44(H) x 180(D) mm ○ Weight: 2.6kg ○ Accessories: None Thank you for viewing.