NS-1000M's

[SoCal Sam]

Thanks. My fingers are crossed. This will be my second pair. After trying auditioning many vintage brands, the Yamaha NS-M series is my favorite.

 

[BroonsBane]

Good scoop Sam :thmbsp:

 

[packrat]

690IIs in Texas...

There's a pair of 690IIs in Texas right now....

http://cgi.ebay.com/Vintage-Yamaha-...ryZ50597QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[Vint Age]

After trying auditioning many vintage brands, the Yamaha NS-M series is my favorite.

I agree. I love it when the speakers disappear and all you're left with is the music. IMHO the 1000(M)'s are magic that way.

 

[BroonsBane]

I agree. I love it when the speakers disappear and all you're left with is the music. IMHO the 1000(M)'s are magic that way.

Definitely one of the strengths of these beauties :thmbsp:

 

[SoCal Sam]

It took almost a month to get them. I coached the seller on packaging and they survived including the grills. As advertised, one mid and one woof are bad. I took the woof out and it was corroded. I think the coil is frozen. It reads 4.5 ohm on my meter so maybe it is fixable.

I had better luck with the mid. I took it out and got wildly fluctuating readings which indicates a short. I took it apart and found the guard cover touching the berylium dome. I also removed the dome to check for breaks and the windings looked good. Readings were still all over the place. I then straightened the wire leads and success. Stable 6.4 ohm reading. Aparently the wire leads were shorting with the housing. Back in it went and it is fine.

I'm not sure what to do with the woofer. Any ideas?

 

[avionic]

I would keep and eye on ebay.There is always someone parting out NS-1000M or pony up the cash to yamaha would be my choice,at least you know it will last along time.Used parts like that are a gamble.





Dave

 

[Vint Age]

I'm not sure what to do with the woofer. Any ideas?

You could PM GordonW with your findings for his comments on whether the woof might be repairable?:scratch2:

It looks like your well on your way to enjoying an awesome pair of speakers.:thmbsp:

 

[Yamaha B-2]

I'm not sure what to do with the woofer. Any ideas?

GordonW did an excellent job rebuilding a NS-1000M woofer for me a couple of years back. The expoxy holding the magnet in place was broken during shipment. Still singing sweetly (as sweetly as a woofer can) with wajobu. Or purchase a new one. In one of the NS-1000/M threads I listed the current prices from Yamaha last month. The new woofer was surprisingly inexpensive. Buying one used on eBay may or may not gain you anything. It may need the same rework.

 

[Vint Age]

From Yamaha:
tweeters are $110, each.
mids are $220, each.
woofers are $170, each.

From the top of this page.

 

[SoCal Sam]

Thanks for the advice guys. Before I seek help or buy a replacement, I'm going to try to save the woofer. The nice thing about the crossover is the mid and high domes can be turned off. I've been pumping some watts into the woofer hoping the good vibrations will loosen it up. It plays but it is down on volume and there is a slight clatter.

 

[SoCal Sam]

From the top of this page.

At least I won't have to spend the $220 for a mid. $170 for a woof is a possibilty.

 

[Vint Age]

I've been pumping some watts into the woofer hoping the good vibrations will loosen it up. It plays but it is down on volume and there is a slight clatter.

I wonder if you disconnected the woofer from the X'over and pulsed it by connecting it to a fresh 9V battery MOMENTARILY to try to get it to release. Of course you want to be real careful not to keep the battery connected for very long as to damage the VC; just a quick make & break with one polarity and then with the opposite polarity.:scratch2: Bare in mind I've never tried such a thing.

 

[SoCal Sam]

Thanks for the tip. The housing around the magnet is badly corroded and the VC was frozen solid. The corrosion must be bad inside. I applied finger pressure to try to unstick but no movement. I eventually was able to work the VC free but it was an all or nothing gamble. I think the VC rusted to the housing and when I freeded it, something broke. I'm getting zero on my meter now. Anyways, I was thinking I'd have to buy a replacement or seek pro help so it was worth a try.

I wonder if you disconnected the woofer from the X'over and pulsed it by connecting it to a fresh 9V battery MOMENTARILY to try to get it to release. Of course you want to be real careful not to keep the battery connected for very long as to damage the VC; just a quick make & break with one polarity and then with the opposite polarity.:scratch2: Bare in mind I've never tried such a thing.

 

[Vint Age]

I think the VC rusted to the housing.

I was afraid that that might be what was going on. Ouch ... :tears:

Hopefully you still wind up with a good deal on a pair of awesome NS-1000M's.:yes:

 

[Yamaha B-2]

Am guessing you are suffering the same problem I had. The magnet shifted (epoxy is broken) and is now rubbing the VC. The more you try to move it the more likely you are causing damage to the VC as it rubs the magnet. If you plan to have it repaired, you might want to stop now and send along to whomever you will use for the repair. Send GordonW a PM and ask his thoughts. He is very skilled in the art of repairs.

 

[lorne]

Now you've got this far, I'd grit my teeth and buy the new Yam parts and update the X-over if it needs be done. :yes: Guarenteed success and in the end you are still miles ahead — at least in terms of what these speakers are going for in Japan. There are always some of these at HiFiDo, but I settled on a pair of Sansui SP-G88 wannabees — for 15,000 yen + throw in new film caps. (Sound good though)