2ohm voice coils

[pmureika 31]

I they say 2 ohm why do they measure 1,5 ohms

[S.DeYoung 968]

That's the dcr. The inductance of a speaker rises with a rise in frequency.

[pmureika 31]

That's the dcr. The inductance of a speaker rises with a rise in frequency.

Is this normal?

[S.DeYoung 968]

Yes completely normal.

[pmureika 31]

Yes completely normal.

then nothing is wrong.

[Duran 387]

Impedance, not inductance.

You are reading the direct current resistance, a D2 coil is normally about 1.4 ohms per coil, and a D1 is normally 0.7 ohms per coil.

[pmureika 31]

Impedance, not inductance.

You are reading the direct current resistance, a D2 coil is normally about 1.4 ohms per coil, and a D1 is normally 0.7 ohms per coil.

Thanks

[S.DeYoung 968]

Duran, doesn't inductance rise also?

[shizzzon 461]

your measuring DC which is resistance... DCR is what you are measuring.

The rating of the coil is rated as impedance, which is AC.

AC fluctuates, DC is constant.

Impedance=AC

Resistance=DC

[pmureika 31]

your measuring DC which is resistance... DCR is what you are measuring.

The rating of the coil is rated as impedance, which is AC.

AC fluctuates, DC is constant.

Impedance=AC

Resistance=DC

So if I measured both coils in series it would be near 4.0?

[shizzzon 461]

not if each is reading 1.5

YOU ARE MEASURING DC, NOT AC!

If both coils read 1.5, then series would be 3.0, parallel would be 0.75

You cannot measure impedance like you can resistance, it has to be calculated.

[pmureika 31]

not if each is reading 1.5

YOU ARE MEASURING DC, NOT AC!

If both coils read 1.5, then series would be 3.0, parallel would be 0.75

You cannot measure impedance like you can resistance, it has to be calculated.

Then a dmm is almost usleast in that app?

[Duran 387]

No, say if the coil was blown, or a lead snapped, there would be no resistance

[Duran 387]

Duran, doesn't inductance rise also?

Yes, inductance changes every time the coil moves.