Correct impedance

[tweeter]

What is the correct impedance of the drivers?
For example, I can see in the market 066 tweeters with impedance from 3.9 to 4.6 ohms.

[Mr. Widget]

What is the correct impedance of the drivers?
For example, I can see in the market 066 tweeters with impedance from 3.9 to 4.6 ohms.

You are confusing DC resistance with AC impedance.

I don't know the correct range of DCR for that tweeter, but 3.9 to 4.6 seems likely to be in the acceptable range. I imagine someone on this board has the factory specs and they might chime in. That said, having a used tweeter with the correct DCR does not guarantee much.


Widget

[Robh3606]

Impedance is frequency dependent. It is the DCR value plus the added reactive resistance from the coil. What you see in the E-Bay adds are the DCR only. As long as it's within "nominal values" it's fine. The Impedance value be it 8 or what have you is just a general approximation. 4/8/16 being the common ratings.

Rob

[rdgrimes]

The spec for the 066 is 3.5-4.4 DC resistance.

These values are all listed in the spec sheets for each speaker model in the "links" section of the forum.

[Mr. Widget]

The spec for the 066 is 3.5-4.4 DC resistance.

These values are all listed in the spec sheets for each speaker model in the "links" section of the forum.

Thanks.


Widget

[Allanvh5150]

Impedance is frequency dependent. It is the DCR value plus the added reactive resistance from the coil. What you see in the E-Bay adds are the DCR only. As long as it's within "nominal values" it's fine. The Impedance value be it 8 or what have you is just a general approximation. 4/8/16 being the common ratings.

Rob

But dont forget, a spaeker can stll have perfect DCR but have a shifted magnet and hence a locked voice coil.

Allan.

[rdgrimes]

Yup. I have tweets (and mids too) that have perfect DCR, and free voice coils that still don't work, or work badly. But it's a good start to know the DCR is right.