i just removed my 4 channel amp because it overheated and it was connected to my 4 component speakers. I rehooked the 4 speakers up to the internal amp in my headunit and it sounded fine. So i decided to go for a drive and i turn it up to about 60% power and the speakers all shut off. I have a separate amp for my sub and that was still playing music. The headunit was still on. its just there was no sound at all coming out of the speakers. I checked the fuse in the back of the headunit as well as the car fuses and they are all fine. Any ideas on what could be wrong?
First, check for shorted or pinched speaker wires that are grounding out or shorted together. Second, since you are running component speakers, check to be sure that ALL tweeters are working, If not your amp will be seeing a dead short if the tweets use a 12dB x-over........
Are you sure about that? In a 12dB x-over the cap is inline before the coil. The cap blocks DC so the radio sees no short. The caps resistance increases as frequency decreases, it is inversely proportional. The coils resistance is proportional to frequency. The point where the resistance is lowest will be at the crossover point. But still high enough not to be seen as a short by the radio. I think a shorted speaker is much more likey than a shorted crossover, and I would test for a shorted speaker.
Ya, i am sure. You make a good point, but even though the cap is limiting low frequencies, the coil is still in parallel with the speaker wires, and the cap needs to see a certain resistance in order to limit those low frequencies. A small coil in a tweeter crossover essentially shows no resistance when the tweeter itself is blown or out of the circuit. It relies on the tweeter to become an operational circuit that shows no dead short..
