Negative Ohms Reading On Speakers?

[walkychalky 10+ year member]

thanks for all the help guys....everything is reading pretty well i think....i get 12.3 @ the batt and then 12.1 at the amp right now ( i figure .2 drop is somewhat normal)...when i get a chance (probably tomorrow) im going to resecure all my connections

 

[jco1385 5,000+ posts]

i would not turn it up too much, incase some dumb shit happens and kills everything

 

[walkychalky 10+ year member]

i would not turn it up too much, incase some dumb shit happens and kills everything

yah i hear ya....i jus might not even play it until i redo my connections....im late for work cause of this tho lol.....thanks again for ur help

 

[jco1385 5,000+ posts]

it's why i am here (other than getting banned)

let us know what was loose.

 

[jco1385 5,000+ posts]

so what was it??

 

[thch 10+ year member]

to the first post:

the most likely causes are:

1.) speaker still connected to amplifier. In this case the amplifier will force a voltage onto the speaker, and you'll measure whatever the DMM thinks that is.

2.) someone pressed on the cone. In this case, the back-emf will force a changing voltage on the coil, similar to how a microphone works. This will be measured as all sorts of random things.

3.) meter was calibrated with a large offset. there may be a "zero" button to allow you to calibrate the meter. connect the two leads together and press the "zero/calibrate" button.

4.) faulty meter.

from a quick glance, i'm guessing #3.

 

[Brian Owens 10+ year member]

He already said it read negative because the stereo was on. Measured fine with it off.

i think the stereo was on actually...i jus retested with it off and i got a reading of ~3.5 on each speaker....dumb mistake....i didnt know the stereo had to be off...my bad

The question was why was the amp shutting off???

 

[jco1385 5,000+ posts]

He already said it read negative because the stereo was on. Measured fine with it off.

The question was why was the amp shutting off???

it was low voltage. something is/was loose.