coil replacement, tolerance?

[Staka]

Hello
i want to replace ferrite coil with air coil in crossover.

I measured values of ferrite coil:

1.56 mH, 0.22 omh.


Is it acceptable to use an air coil that has the following values:
1.50 mH, 0.30 omh

if the difference is too large, what should be the tolerance?

 

[Galu]

Plus or minus 5% in the inductance value would be an acceptable tolerance in most crossover applications. Plus or minus 10% in non-critical situations.

I would regard the air coil to be a reasonable substitute, but obviously I don't know your exact application.

 

[Staka]

Plus or minus 5% in the inductance value would be an acceptable tolerance in most crossover applications. Plus or minus 10% in non-critical situations.

I would regard the air coil to be a reasonable substitute, but obviously I don't know your exact application.

it's a bass coil. The speaker is a three way system, high and mid have air coils

 

[Lojzek]

I'd advise exchanging a ferrite inductor only if it were totally of unsuitable quality and if you were causing it to saturate under normal operating conditions and it takes quite some current to start misbehaving at all. An example attached.

 

[Galu]

Go ahead and do the replacement in one speaker then compare it with the other, unmodified, speaker. Let your ears decide. Personally, I don't think you'll find a massive difference.

 

[Inductor]

I would say also, try to use any inductors with equiv. Diam. that has less DCR (~=0.22 ohms) so it doesn't affect your circuito design or woofer output level.

"Ohm" = SI unit

 

[Staka]

Thanks for the answers, I'll keep the ferrite coil

 

[Galu]

Thanks Staka, but no harm in experimenting if you change your mind.