Speakers and Impedeance

[MiXit-G]

How can i test a speakers impedeance ? just with a multimeter?

And how would running speakers in series or parrallel affect resistance?

 

[esun127]

A multimeter should give the resistance theoretically, but I've never actually tried it so I woudln't know.

When you run speakers in series, you just add all the resistances.

When you run speakers in parallel, the formula for the equivalent resistance is
1/Req = 1/R1 + 1/R2 + ..... etc

 

[kid klash]

Yes - you can use a multimeter to test the DC resistance (impedance) of a speaker.

The resistance of a speaker will vary, depending upon the frequency of the signal going through the voice coil.

The typical "8 ohm" speaker has a DC resistance of 5-6 ohms; the typical "4 ohm" speaker has a DC resistance of 3 ohms.

 

[Sonixx]

Yes - you can use a multimeter to test the DC resistance (impedance) of a speaker.

The resistance of a speaker will vary, depending upon the frequency of the signal going through the voice coil.

The typical "8 ohm" speaker has a DC resistance of 5-6 ohms; the typical "4 ohm" speaker has a DC resistance of 3 ohms.

you've got it backwards...

you can't measure the impedance with a DC multimeter. impedance is based on frequency.

you can measure the DC resistance of the Coil which is not based on frequency.

resistance is not the same as impedance.

 

[kid klash]

Thanks Sonixx - you're right - sometimes it's tough to clack out a decent reply when you're doing it at work, on the sly...

 

[Sonixx]