It works in a similar way as active noise-cancelling headphones – it generates a signal identical to that of the incoming electrical noise but in the opposite phase, actively cancelling it out. This is highly effective at removing low- and mid-frequency noise, while passive insulating filters deal with higher frequency interference. This combination is measurably more effective at eradicating noise corrupting the USB signal than devices relying solely on passive filtering.

Like new condition w/original box. Questions welcome!

zen dac v2 with silencer and long usb cable

iFi Audio iSilencer+ USB Audio Silencer. The iSilencer+ 3.0 USB isolator from iFi Audio is a very effective method to eliminate the constant background noise and distortion that is common with USB audio components. The function of this device is in its name, to silence your equipment so you can enjoy your music and films free from noise free. Insert the iSilencer+ 3.0 into a USB port of your computer and it starts to work, just like that. Your music will sound so much clearer, you will notice the finer details and the bass and transparency will be improved significantly. The iSilencer+ is normally used with active USB ports that you connect another device in to, however, it can also be used in unused USB ports. If you double up on these with the built in ANC circuit you will in effect double the noise reduction. Therefore you will get an exceptionally noise free musical performance. With the newly improved ANC (Active Noise Cancellation) technology that decreases the common mode noise by 40dB. REBalance technology also aids in eliminating your devices of annoying clicks and distortion. The iSilencer+ gives you a simple and easy method to eliminate the 'sound spooks' that haunt your system. We are an authorised iFi Audio dealership, so you can be assured of genuine products, covered by a full manufacturers warranty. Specifications: Super-Speed USB3.0 (and USB2.0 backwards compatible) Connectors: USB3.0 gold-plated connectors Dimensions: 48 (l) x 18 (w) x 8 mm (h) Weight: 6.3g (0.22oz) ORIGINAL PACKAGING NOT SUPPLIED