I have a question that I'm not sure belongs here or not but I figured I would at least get an explanation as to why I'm experiencing this and possibly a workaround. So let me give a brief overview of what's going on.
I have a BMW 330i and the radio supports AUX however you need to purchase (or make) an AUX cable that connects to the back of the stock radio. I opted to make my own cable. I used the diagram from the BMW manual to wire it, here's the diagram in case anyone wants to see it: http://www.ge39.com/files/EBADoc11512-auxin.pdf . Anyways in order to use a device and charge it at the same time you need to wire a capacitor to the left and right channel wire in series to prevent some type of power surge or something? This is what I'm not clear about. There's also a resistor that goes on the side of the capacitors closest to the head unit this is to provide resistance to let the head unit know that it should enable AUX. Now when I add the capacitors to the right and left channel wires the bass is more or less non-existent and I've been told the reason is that the capacitors, when added in series, act as a sort of filter and filter out the lower frequencies.
Given my lack of electronic knowledge, I've come to you intelligent people to ask if anyone has an ideas why the capacitors act like this and see if there's anything I can do to keep the circuit how it is but not mess with the lower frequencies? Perhaps a larger capacitor? The capacitor in the diagram lists 0.22 F but everyone that makes these cables on the forums says that it should be a 0.22uF capacitor however people who use either one seem to still have an issue with the bass so I'm not sure if the size of the capacitor is causing this behavior.
Does anyone have any insight, or can tell me why the capacitors are needed to charge my phone and listen to aux at the same time?
Thank you!
I have a BMW 330i and the radio supports AUX however you need to purchase (or make) an AUX cable that connects to the back of the stock radio. I opted to make my own cable. I used the diagram from the BMW manual to wire it, here's the diagram in case anyone wants to see it: http://www.ge39.com/files/EBADoc11512-auxin.pdf . Anyways in order to use a device and charge it at the same time you need to wire a capacitor to the left and right channel wire in series to prevent some type of power surge or something? This is what I'm not clear about. There's also a resistor that goes on the side of the capacitors closest to the head unit this is to provide resistance to let the head unit know that it should enable AUX. Now when I add the capacitors to the right and left channel wires the bass is more or less non-existent and I've been told the reason is that the capacitors, when added in series, act as a sort of filter and filter out the lower frequencies.
Given my lack of electronic knowledge, I've come to you intelligent people to ask if anyone has an ideas why the capacitors act like this and see if there's anything I can do to keep the circuit how it is but not mess with the lower frequencies? Perhaps a larger capacitor? The capacitor in the diagram lists 0.22 F but everyone that makes these cables on the forums says that it should be a 0.22uF capacitor however people who use either one seem to still have an issue with the bass so I'm not sure if the size of the capacitor is causing this behavior.
Does anyone have any insight, or can tell me why the capacitors are needed to charge my phone and listen to aux at the same time?
Thank you!