Urgent help....

[Yamaheart]

I removed all drivers from my NS-1000M to do a light sand and re-finish the wood. I kinda got the wires mixed up. Each driver has 1 black and I assumed that is negative, but for some reason both tweeters had black as Positive. How do you test which wire is negative and positive. Please help ASAP....

 

[jostenmeat]

I removed all drivers from my NS-1000M to do a light sand and re-finish the wood. I kinda got the wires mixed up. Each driver has 1 black and I assumed that is negative, but for some reason both tweeters had black as Positive. How do you test which wire is negative and positive. Please help ASAP....

While you wait for a good answer from someone, I highly recommend you contact Yamaha speaker support. Yes, it's the weekend, you'll have to wait until next week for a response. They will let you know what is what though.

 

[Yamaheart]

anyone with anything? Thanks you.....

 

[PENG]

Can you tell from the size of the terminals of the driver? It does not matter how you connect them as long as you connect all of the speakers the same way so they are all in phase. You could try the "pop test" method using a 1.5V (the lower the safer) battery but with tweeters it may be hard to see the cone movement.

 

[Yamaheart]

Can you tell from the size of the terminals of the driver? It does not matter how you connect them as long as you connect all of the speakers the same way so they are all in phase. You could try the "pop test" method using a 1.5V (the lower the safer) battery but with tweeters it may be hard to see the cone movement.

How do you POP TEST them? I was looking at ebay and some of the Tweeters from sellers show that Purple wire for Negative and Black for Positive( for Tweeter). But the Midrange is black for negative and Yellow for Positive, Im not sure about the Woofer. I would think Black would be Negative for Woofer. That is strange, why would Black be Positive for Tweeter, I guess only Yamaha can explain that... Please let me know ASAP, I am trying to enjoy these Speakers tonight, I just got it re-finished...

 

[Swerd]

The pop test can only tell you which terminals on a woofer or tweeter are positive and negative. Your problem is you don't know which wire coming from the crossover is positive and negative. A simple pop test won't help with that. You will have to hear from Yamaha about that.

The pop test involves a 1.5 volt AA battery and two short pieces of wire. Hold or tape the wires so one goes from the + end of the battery to one terminal on a driver (woofer or tweeter). Similarly attach the minus end of the battery to the other terminal. If you have the + end of the battery attached to the + terminal of the driver, the cone will pop forward when you make final attachment. If the driver cone pops backward, the battery + terminal is attached to the driver minus terminal. With 1.5 volts you won't harm the drivers.

It may be possible to guess which wires are plus and which are minus and test it with an AA battery. Make your best guess attachments for the woofer and tweeter, and attach the battery at the terminals at the back of the speaker cabinet. If both the woofer and tweeter pop forward, you've guessed correctly. With some trial and error you should be able to figure it out by this method. Even with a 3-way speaker you should be able to get it by trial and error.

Are the crossovers visible, and can you post a photo of them?

The positive terminal on woofers and tweeters are usually marked with a plus (+) mark, or with a colored (often red) dot. Sometimes the plus mark is embossed in the plastic. Look closely with a flashlight.

 

[TLS Guy]

The tweeters may be wired electrically out of phase on purpose. Second order crossovers quite often put the speakers out of phase at crossover creating a null. So the tweeter then has to be wired out of phase. If you can be certain that was the way they were before, then that is the way they need to go back.

 

[Alex2507]

Can you tell from the size of the terminals of the driver?

Your answer may lie in this question alone.
On the few speakers I have fooled around with the - and + are different sizes.

 

[Yamaheart]

Your answer may lie in this question alone.
On the few speakers I have fooled around with the - and + are different sizes.

They all the same....

 

[Yamaheart]

Thank you everyone for your time.....

TLS Guy, that was the one thing that got me. I had to made sure when Un-soldered the terminals, I had wrote down Black to that Terminal but did not realized that it was POSITIVE. I think you are right, cuz Im sure that was BLACK for POSITIVE in the TWEETERs. All Normal on Mid and Woofers. Thank you all once again.

 

[Edmonton]

next refinish, take some pictures first

 

[Alex2507]

Not that it will help you now but maybe next time some pictures before hand or doing one at a time after checking that both are the same will keep this from happening again. Let us know what the outcome is.

 

[PENG]

The tweeters may be wired electrically out of phase on purpose. Second order crossovers quite often put the speakers out of phase at crossover creating a null. So the tweeter then has to be wired out of phase. If you can be certain that was the way they were before, then that is the way they need to go back.

+1, they key words are "if you can be certain.....they were before" then don't worry about the color of the wires, wire them up the same way for both tweeters and enjoy.

 

[PENG]

I think you are right, cuz Im sure that was BLACK for POSITIVE in the TWEETERs. All Normal on Mid and Woofers.

Just curious, if the tweeter terminals look the same and no red dot etc., then how do you know which one is positive? Secondly, I am pretty sure TLS is saying that the tweeter may be wired purposedly in anti phase with the other drivers (mid and bass) so the black may in fact be -ve, but if that's the way it was before you should be fine. You can still contact Yamaha to be 100% sure.

 

[Yamaheart]

Just curious, if the tweeter terminals look the same and no red dot etc., then how do you know which one is positive? Secondly, I am pretty sure TLS is saying that the tweeter may be wired purposedly in anti phase with the other drivers (mid and bass) so the black may in fact be -ve, but if that's the way it was before you should be fine. You can still contact Yamaha to be 100% sure.

Yes, I did mark it before and then realized why BLACK for Positive. That was why it got me... Thanks all very much. Pix will be up soon....

 

[Yamaheart]

Here we go...

I did buy the TV mount, longer HDMI, DVI cables to put them in-wall. And here we go, the YAMAHA NS-1000M (stay true to the brand). I got the stands with them. I did re-finished them, the job was decent, not perfect. Black stain with Polyurethane.. Once again, thanks all for help and advices....