moe3152
CarAudio.com Recruit
Can anyone tell me if a capacitor on a tweeter affects it's impedance? Without any music playing the capacitor does not have continuity, so a multimeter has nothing to read.
No. The tweeter has the same impedance regardless. The amplifier/radio will still see 4 Ohms.Can anyone tell me if a capacitor on a tweeter affects it's impedance? Without any music playing the capacitor does not have continuity, so a multimeter has nothing to read.
Capacitors are reactive so at some frequencies they present no impedance, while at lower frequencies the impedance of the capacitor will increase.Can anyone tell me if a capacitor on a tweeter affects it's impedance? Without any music playing the capacitor does not have continuity, so a multimeter has nothing to read.
Kinda. We know the woofer's coil's impedance rises at higher frequency and the capacitor that's inline with the tweeter has the opposite effect. Whatever the woofer's impedance is, is what you should consider the impedance of your circuit.So, that being the case, if it's wired in parallel with the woofer then the total impedance for the two can be all over the chart and a multimeter can't really tell you anything, right?
Doesn't matter. You measured DC resistance. Impedance is reactive and changes with the frequencies(s) being played.Ok thanks. I did bypass the cap with a small jumper wire and measured the combined impedance of the tweeter and woofer(parallel) and it dropped to 4 ohms.
No. The tweeter has the same impedance regardless. The amplifier/radio will still see 4 Ohms.
It filters out the lower frequencies.Why do you have a cap on a tweeter?
A capacitor is basically a battery. How would it do that?It filters out the lower frequencies.
Because that is what a capacitor does. When wired in series a cap functions as a high pass filter. Wired in parallel, caps are low pass filters. Music isn't an DC power source, it's AC, therefore the capacitor is charging and discharging as the music plays. When wired in series, at lower frequencies the cap will be able to charge/discharge fast enough to prevent a change in voltage and therefore block those frequencies. Capacitors are common in power supplies to block noise; that is why you don't see/hear 60hz background noise in your home electronics. Capacitors are also common in crossovers to block frequencies.A capacitor is basically a battery. How would it do that?