Will your radios work on a 6-volt system or a positive grounding system? Contents Still have questions? Contact us. RetroSound® radios are designed to work on 12-volt negative grounding systems only. Still have questions? Contact us.First Name *Email Address *Phone NumberMessage0 / 180Send MessagePlease do not fill in this field. Please do not fill in this field. Tagged: 6-VoltPositive Ground Was this article helpful? Yes No Related Articles Installing the hands-free Bluetooth microphone Amplifier Troubleshooting Radio cuts in and out while car is running. My radio is turning on, but I have no sound. What is a common ground speaker system? Why is my radio not turning on?