Hi lexus people, ok so i have just installed car subwoofer in my daily driver is200 and its sounds ace really good sq from a JL audio 12. Now what the question today is that everytime i turn on and off the engine, its makes a thump noise on full volume and the kids are getting scared lol, even when its on a low volume which is not good. Had a look on this car audio install system website that i have found online and its says its because the radio is coming on quicker than the actual amp, so do i need a relay? Which one and could i also build one?
