Speaker Asylum

Sorry but you should be concerned even when not in HF

104.35.189.164

Edp

In Reply to: RE: The iron core has to go. posted by tomservo on September 17, 2024 at 13:48:33

If a driver ( ultra high quality in this case) is designed and used for output up to 4500, it has no business being impacted by a non-air core inductor, for low power home audio use in a desired high resolution setup.

Not a feeling or a fad, just 50 years plus of experience building, modifying and frankly fixing speakers.

Follow Ups:

RE: Sorry but you should be concerned even when not in HF - tomservo 17:35:17 09/17/24 (1)
Ok, but there is also the cap across the LF driver also rolling it off at a design crossover F.
That presents a falling impedance to the inductor output side while it's series impedance is increasing. What ever inductance related distortion, is always at multiple higher frequencies where the capacitor's impedance is even lower.

Have you measured a filter under static R load with an open frame inductor like that vs an air core of the same Rdc? If so what did you observe?
Tom
also like speakers
- If you keep the DCR same, the coil gauge is way too small - Edp 08:50:32 09/18/24 (0)
  If we could get air cores that have same DCR in a non- dental floss gauge, we wouldn't need cored inductors.
  
  In a hobby that has members convinced they can hear the direction of the fabric bias on cotton wrapped speaker wires, then when actual measurable sonic degradation is identified, same members scoff. Most have probably never even held an inductor.
  
  Appreciate your input, but I'm confident in my understanding of the need to avoid cored inductors, except in cases of needing low DCR and below 200 to 250 hz., or it's a fix for a friend who owns a JBL 100, cored is a gigantic step above the "no inductors here bass,midrange crossovers"

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