Whether your car is on or off, PowerBass power accessories will have the music blaring. The PowerBass APS-100 series of AC-to-DC power supplies are ideal for shows, competitions and boat audio. By plugging this supply into a wall outlet, you can send stable power to the audio system without starting the engine. We also have PowerBass farad capacitors for power reserves and other accessories that audiophiles need. Shipping is free in the lower 48 states with a 60-day guarantee.