Alternate source for 12v power

zakimak

Agreed with Italy about the relay and its importance when multiple devices are being turned on and don't forget to fuse the relay too while were at it. It is absolutely the right way to do it. That said it does not mean that you cannot get away with using existing remote trigger. What is important is knowing the draw will match what is available. To be safe, a relay will remove any guess work and another benefit is that you can delay turn on and turn off to prevent power spike heard through the speakers. What is confusing is why would the op use accessory power to trigger the amp. By that rationale, every time your car is on, the amp is on irrelevant whether the head unit is on. If this is the case, having the amp in full power mode before other equipment in the chain turned on will cause damage to the system eventually...now I'll sit back and enjoy the fireworks..;-)

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