Here are the AC-to-DC audio speakers that I built. They are the most versatile audio speakers in the world since they can be operated on AC power, DC power with lithium battery, lead-acid battery and even alkaline battery. With lead-acid battery they in turn can be recharged. Truly amazing!
Home How To's & Cool Tips DIY AC to DC audio speakers – The world most versatile rechargeable...
DIY AC to DC audio speakers – The world most versatile rechargeable DC audio speaker DIY project