Does anyone know anything about Kicker Passive Crossovers. When I got my car someone had put them one the 4x6's and 6x9's. They are enclosed in an amber cylinder and have model numbers:
x4500-4 (this one is 4 ohms)
x3500-6 (this one is 2 ohms)

I am kind clueless one the quality and anything else about these. If anyone could help I would appreciate it. Thanx.

 

Just by the model numbers, I would have to guess these are high pass crossovers with crossover points at 3.5K and 4.5K respectively. You could try them on a cheap test speaker, and if all you get are high tones, then that is probably what they are.