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Original Message
Some components have plated steel leads.
Posted by Al Sekela on September 10, 2010 at 11:59:24:
The lead wires are made of steel to allow magnetic handling in automated circuit board building machines. They are plated with something to allow them to be soldered.
Anything magnetic is bad for sound.
The JW Miller 5502 or 5522 RF chokes may give better sound than resistors if your problem is RF noise picked up by the speaker wiring acting as antennas. These chokes have very low DC resistance and do not compromise the dynamics.