is there a need for these? i have some 5.25 in my truck. won't the crossover on my amp block the lower frequencies or do i need to get some? aren't they just capacitors? if so what farad would i need?
That's not always the best solution. In my case it would kill the lower frequency response of my sub (to nothing) and to my components when all I want to do is block the bass to the rear speakers.