Maybe something really small like the induced interference based on the winding polarity of the cap and considering the impedance of source and load. Maybe I could be convinced that physics allows this. I sure would not loose any sleep over it.
I'm now fairly convinced the stray capacitance is around a mere 10pF from a biggish 3.3uF poly capacitor, so it doesn't seem like a lot to worry about.
THIS was bad practise by me. I put a 1uF Zobel capacitor inside the tweeter coil to save room. I got told off for that. 😱
And the two coils are lined up on direction, which is poor, rather than right angles. It's also very common to put a capacitor near a coil's axis on a circuit board. That's a bit like putting a metal plate near a coil and is also bad practise.
I expect you've all read Troels Gravesen on this subject: Placement of coils in crossover networks
THIS was bad practise by me. I put a 1uF Zobel capacitor inside the tweeter coil to save room. I got told off for that. 😱
An externally hosted image should be here but it was not working when we last tested it.
And the two coils are lined up on direction, which is poor, rather than right angles. It's also very common to put a capacitor near a coil's axis on a circuit board. That's a bit like putting a metal plate near a coil and is also bad practise.
I expect you've all read Troels Gravesen on this subject: Placement of coils in crossover networks
Hi,
Star earthing on a x/o is a very moot point, given cable resistances,
and that any non star earthing on a x/o board will be there to utilise
as much board copper as possible with inconsequential downsides.
One point of biwiring (if their really is any) is separating the
the return currents of the various x/o sections (parallel).
TBH I'd say no / it doesn't matter. Loop earthing if it provides
2 paths of lower resistance (like mains loop cooker circuits)
is a valid approach to lowering board resistances.
In audio equipment though its a complete no-no.
rgds, sreten.
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