Stereo AUX Turntable / Phono Preamp Preamplifier input selector Controller, Low Noise Operation , with DC 12V power supply. Follow these steps to connect earth to ground: - Do not use any tools. 1. Turn A 5 counter clockwise. 2. Insert a ground cable (not included) from your turntable into A 5 . 3. Turn A 5 clockwise to fix A 5 back in place. Connecting the product 4 Make sure all the devices are switched off before connecting the product. 1. Plug a turntable into the RCA input A 3 using a twin RCA cable (not included). 2. Plug the speakers into the RCA output A 4 using a twin RCA cable (not included). 3. Plug the power adapter A 7 into the power input A 6 . 4. Plug the power adapter into a power outlet. Using the product ● Use the power switch A 2 to switch the product on or off. The power indicator LED A 1 lights up.