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Yamaha NS-1000X's
- Thread starter Mark B
- Start date
I bet they still would have shifted even if packed seperately ... the glue on these old woofers is so crumbly and weak that it doesn't take much of a side-hit to make the very strong magnet suck itself free and jam against the plate.
These can be fixed - I just finished repairing a pair of HPM-150 woofers that suffered the same fate - the magnets shifted sideways during shipping. I had volunteered to refoam the woofers, but when they arrived with the shifted magnets I sort-a said "I'll try....:sigh:..."
I had to build a jig to hold the magnet in alignment with the frame and carefully lower it into place. It took three tries to get the right kind of jig built. I didn't remove the dust cap, cone, or spider to do it. The owner, another AKer, started using them this weekend and is happy with the results so far.
Previously I repaired an Advent woofer, but for that one I cut the spider and dust cap out, then reglued it after the magnet was secured. Not as clean and neat, but it worked. The HPM woofers were a challange because I didn't want to cut out the spider or the dust cap if I didn't have too.
(I was planning on posting a few pics of the process later this week if time premits.)
centaurus3200
Well-Known Member
that blows dude :-(
yeah, when i got my NS-1000M, i noticed one woofer rattled (scraping VC). magnet must have shifted. rather than have it fixed, i opted to buy two new woofers with the later revised "B" magnet structure. i think they are current production as Yamaha still makes the NS-1000 series in japan. the new woofer's glue is clear as day. the old woofers had yellowed glue.
here's the woofer (with the grill)
http://www.partstore.com/Part/Yamaha+Electronics+Corporation/Yamaha/XD115A00/New.aspx
ask them if they can source the carbon "X" woofer.
see ya,
Robby
yeah, when i got my NS-1000M, i noticed one woofer rattled (scraping VC). magnet must have shifted. rather than have it fixed, i opted to buy two new woofers with the later revised "B" magnet structure. i think they are current production as Yamaha still makes the NS-1000 series in japan. the new woofer's glue is clear as day. the old woofers had yellowed glue.
here's the woofer (with the grill)
http://www.partstore.com/Part/Yamaha+Electronics+Corporation/Yamaha/XD115A00/New.aspx
ask them if they can source the carbon "X" woofer.
see ya,
Robby
Damage
Super Member
Problem with the Yamahas is that there is very little gap between the pole and the gasket. Unless you have an accurate positional table with measurements in the 1000ths. I take the cone off, it isn't that hard to do.
You sent me a PM saying that you could fix the woofer. Have you perfected a process for repairing the magnets on these woofers?
Here are some better pictures of the magnet and the voice coil:
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Damage
Super Member
Ouch! looks like a portion of the magnet flat out broke. I wonder how bad it is fractured internally...
Anyways, I have done several pairs of Yamahas now. I'm sure Gordon is better.
Anyways, I have done several pairs of Yamahas now. I'm sure Gordon is better.
AK member GordonW did one of the woofers on my NS-1000M for me with similar problems. Excellent work at a fair price. Give him a shout.
This is not an unusual problem for these woofers. The epoxy gets very brittle with age and the weight, even when properly packed, can pop one loose.
Raphael
Dream catcher.
A hard lesson learned :tears: . . heavy drivers should be removed and packed separately. Resealing is much more painless than the stress of busted ferrite and mangled coils.
The only expeditious alternatives should be to spend more for both shipping and materials and big-bubble the entire cabinet to about 4" thick and set within a coffin of 1.5' styrofoam sheets . . . or . . . use heavyweight 4" upholsery foam and again--cocoon it within the styrofoam sheets.
These methods will require manipulating cardboard pieces to make additional corner protection and placing them between the soft and hard insulators.
Just my recommendations but pretty bomb-proof and about $20 more per speaker.
The only expeditious alternatives should be to spend more for both shipping and materials and big-bubble the entire cabinet to about 4" thick and set within a coffin of 1.5' styrofoam sheets . . . or . . . use heavyweight 4" upholsery foam and again--cocoon it within the styrofoam sheets.
These methods will require manipulating cardboard pieces to make additional corner protection and placing them between the soft and hard insulators.
Just my recommendations but pretty bomb-proof and about $20 more per speaker.
What is the part number of the woofer? I can see the start "JA.... and end ......60", but not the middle numbers.
centaurus3200
Well-Known Member
well, it will cost some cash to fix, but i'd definitely contact the shipper and make them pay! show them how well they were packed. obviously the morons must have been throwing the boxes around to cause that sort of magnet damage!
see ya,
Robby
see ya,
Robby
You sent me a PM saying that you could fix the woofer. Have you perfected a process for repairing the magnets on these woofers?
Here are some better pictures of the magnet and the voice coil:
Wow...looks like the glue held up fine and the magnet split apart! Must have been a BIG drop! Also looks like the pole piece shifted relative to the magnet as well as the magnet breaking free - ouchhh. I feel your pain - hope it gets resolved with the shipper. I also hope Yamaha still sells these woofers!
Best of luck with these.
(BTW I still think it can be repaired, although the magnet might need to be replaced with an equal sized item, perhaps donated from another Yamaha speaker.)
centaurus3200
Well-Known Member
as stated previously, the shipping company is gonna have to pay for this. they OBVIOUSLY dropped the box accidentally (the speakers were packed so well - it couldn't be an issue). you might try and get the cost of replacement for the WHOLE SPEAKER, then go from there.
I'd plead with Yamaha and get them to sell you JUST THE MAGNET. they will be the later revised "B" version though, so you might have to get two magnets to match?
or ask them if it's possible to ship them the woofers and have them use the cones to install on new baskets and magnets? i don't think they make that cone anymore :-(
they do still make the NS-1000/M woofer though. i just bought a pair!
see ya,
Robby
I'd plead with Yamaha and get them to sell you JUST THE MAGNET. they will be the later revised "B" version though, so you might have to get two magnets to match?
or ask them if it's possible to ship them the woofers and have them use the cones to install on new baskets and magnets? i don't think they make that cone anymore :-(
they do still make the NS-1000/M woofer though. i just bought a pair!
see ya,
Robby
So contrary to the common perception, Yamaha did use good glue, not surprising after all it comes from the land of the Crazy Glue.
I know for sure that Yamaha doesn't make the carbon fiber woofer anymore, I inquired from Yamaha Japan where my brother in law's relatives work, one of the reasons I am treasuring my 1000x, by the way, he informed me that many 1000x and 2000 are there for sale in Japan so all hope is not lost.
I know for sure that Yamaha doesn't make the carbon fiber woofer anymore, I inquired from Yamaha Japan where my brother in law's relatives work, one of the reasons I am treasuring my 1000x, by the way, he informed me that many 1000x and 2000 are there for sale in Japan so all hope is not lost.