using dmm

[Haunz 10+ year member]

Is the power light on ?

Is the protection light on ?

 

[liljojo4711 10+ year member]

if my amp turns on and has a green light then voltage must be reaching the amp correct? and the hu is sending a signal. and it is sending voltage to the speaker outputs because i used the reading to check my volts to set the gain for my amp. i must have just wired it wrong when hooking it back up, but i dont see how. maybe when i took the sub out of the box i re-rewired it wrong lol. i dont know.

 

[liljojo4711 10+ year member]

any more ideas please post them. i will rewire everything when i get back from school and let yall know whats up. thanks for the help so far!!

 

[jrwalte 10+ year member]

You removed the sub from the box? That was unnecessary for setting gains. What sub/how many and what voice coil specs so we can be sure you have it wired right?

 

[99grandprixGT 5,000+ posts]

ya you could have disconnected the wires from the subs when you took them out and forgot to wire them back.

 

[Twistid 5,000+ posts]

You fried it. What brand, model number of amplifier + woofer ?

 

[liljojo4711 10+ year member]

i have a mach 5 audio 10" IXL dual 2 and a planet audio bb1350.1b amp

i wired all the minus and all the plus so that should give me a 1ohm load to the amp. im going to go take the sub back out and make sure its wired correctly again and check my wires inside the car. i have made this so much harder and all i want to do is listen to my fuking system lol!!!

 

[liljojo4711 10+ year member]

re-wired everything. still nothing... i guess im just going to pay someone to look at it which really pisses me off.

 

[wp7456 10+ year member]

Wait is there a difference between a dmm and a voltmeter? Back when I tried using a voltmeter to set my gains with a test tone, the numbers would not stop jumping all over the place.

 

[liljojo4711 10+ year member]

u have to use a 50hz tone instead of a song.

so i used the dmm on my sub where the speaker wire goes. on one side it reads ~.007 and the other ~.001. does this mean a coil on my sub is messed up?

 

[FoxPro5 5,000+ posts]

Wait is there a difference between a dmm and a voltmeter? Back when I tried using a voltmeter to set my gains with a test tone, the numbers would not stop jumping all over the place.

DMM = digital multi meter

You use it to measure voltage in alternating current form (ACV or VAC). Usually identified as V~

Like it was just mentioned, you need to use a test tone to get a constant voltage reading, because test tones have constant voltages.

 

[liljojo4711 10+ year member]

i put the dmm to my voice coils to measure ohms and nothing happend. so does that mean blown voice coils?

 

[350zspl 10+ year member]

if you put volt meter on ohm

and you put + to + meter lead to + coil

and - to - meter lead to - coil

each coil should read 2 ohm

you may have a blown sub

does it make a scratching sound when you push sub in