Using your Clearaudio Nano V2 Phono Preamp is easy. First, connect it to your turntable using the high - quality gold - plated RCA inputs. Then, choose the appropriate cartridge mode (MM or MC) with the switch. You can adjust the gain using the illuminated gain control wheel knob. The on/off switch allows you to power it on and off conveniently. When it comes to maintenance, keep it in a clean and dry place. Avoid exposing it to extreme temperatures or humidity. If you want to change the input impedance, use the plug - in links. And don't forget to register your preamp to get a 3 - year warranty. Also, make sure to use the right power adaptor according to your location (US, EU, or UK). The subsonic filter can be switched on to protect your system from low - frequency noise, so use it when needed.