The Heart and SOL of Your Pedalboard SOL is the ultimate solution for bringing life to a small to medium-sized pedalboard setup, especially if you are using power-hungry pedals. SOL is the smallest mains-powered switch-mode power supply we make at CIOKS (no wall-warts here) and the no-frills design plus massive power will leave you free to focus on your creative spark. Featuring the same 660mA at 9V DC per outlet and four switchable voltages on each outlet as its bigger brother CIOKS DC7, SOL is the most powerful small form-factor power supply available today with a total of 30 watts of DC power available.