Jantzen Wax Coil or Mundorf M-Coil CFC

Ooops sorry (brain fart), saw Mundorf, Jantzen and M and thought cap.

If that’s the case get over value air coil ones and with cheap inductance meter, take some winding off till you reach your preferred inductance.

Cheers George

If the originals are air core and replaced with good quality air core with the same inductance and same dc resistance as the originals, I don’t think it matters too much.

But if you replace an iron core with an air core of the same inductance and dc resistance, then you "may" hear a difference, as an iron core will saturate earlier than an air core on big transients.

They sometimes use iron core chokes (coils) as a cost cutting (less copper needed) and for smaller physical size.

Cheers George

Debatable if you would hear the expense difference. Just change any iron core inductors for air core of the same value and dc resistance.

Cheers George