Measuring Ohms?

[Gord]

Hey!
I have a firebass going into an eden 410. I know it's been rewired to 2 ohms in the past, but now I have no idea where it's at. Is there any way of measuring, say, with a multimeter, how many ohms my amp is putting out?

 

[BassIan]

Your amplifier does not "put out" ohms.

You can measure the DC resistance of your cabinet with a multimeter. It will read somewhat below the nominal impedance because it's only reading the DC component of the impedance, but it should be conclusive enough to tell you what the cabinet's nominal impedance is. Expect around 3-3.5 ohms for a 4 ohm cabinet, and 6-7 ohms for an 8 ohm cabinet.

 

[12bass]

Expect around 3-3.5 ohms for a 4 ohm cabinet, and 6-7 ohms for an 8 ohm cabinet.

...and about 1.5 ohms for a 2 ohm cabinet.

 

[Gord]

ok awesome, now how do I do that?

 

[Gord]

what I meant was, where does the red jack go? the black?

 

[spideyjg]

If measuring resistance of a coil, the polarity doesn't matter.

I do red to positive, black to negative always just as force of habit from measuring stuff where it matters.

Jim

 

[i_got_a_mohawk]

Cant you just open the back of the cab and look at how the speakers are wired and what the stated impedances on them are?

 

[12bass]

All you need to do to check the impedance of your cabinet is disconnect the amp, and put the ohmmeter on the cabinet's input connector. Polarity doesn't matter. If it is less than 2 ohms, it's wired for 2 ohms. If it is around 6 ohms, then it is wired for 8 ohms.