Do they make a big difference like the capacitors? Do you guys have a certain brand that you guys would recommend? From the way that the inductors in my speaker look like, I believe I have ERSE inductors. Are the a good brand?
I hear good things about them, but I do NOT recommend the same kind of upgrades. You need to measure the DCR of the original coils and match them.
If you reduce the DCR of the coil, you must add it back with a series resistor.
For a midrange, or mid-woofer I like to use flat coil copper inductors from Jantzen or Mundorf.
For 3-ways the ERSE coils are my favorite on the woofer.
I usually leave shunt coils in the tweet and mid alone.