Yamaha NS1000M, cleaning the units

amplifiers, receivers and loudspeakers
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wzevon1951
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Yamaha NS1000M, cleaning the units

Post by wzevon1951 » 25 Jun 2019 14:16

i have a pair of NS1000m's and only noticed the other day that there are some blackish marks on one of the mid range units. There are a couple of stains on the beryllium dome. Now I have looked around to find the conventional wisdom of taking the grills off, my feeling is on balance, don't! The grill is very fine on the mid ranger, and I have stared at it for an hour without any inspiration. It is a challenge to my fastidiousness, but the answer is probably, deal with it. The stains look like liquid splashes, beer or the like.
Has anyone had first hand experience of taking the grilles off? It makes the discussion about the speaker fronts a bit more relevant, this is surely the sort of damage that fronts are there to prevent.

pivot
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Re: Yamaha NS1000M, cleaning the units

Post by pivot » 25 Jun 2019 14:47

Do they sound okay? If so, leave them alone. The beryllium drivers are fragile. That's why there are grills are there to start with.

Look up how much the drivers go for on the used market. That should convince you to leave 'em alone.

Alec124c41
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Re: Yamaha NS1000M, cleaning the units

Post by Alec124c41 » 25 Jun 2019 18:35

If you are really determined to do this, I believe the grills are held with gorilla snot, a caulking compound, in a slot, and could be worked out by carefully going around the edge, and puling it out slowly.

Cheers,
Alec

Umberto_V
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Re: Yamaha NS1000M, cleaning the units

Post by Umberto_V » 26 Jun 2019 13:03

Once saw a beryllium tweeter being shattered when a chain around someones neck who was standing too close to the speaker was attracted to it by the magnet in the tweeter. That's how fragile they are.

If they sound ok then best to leave them alone.

markcass
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Re: Yamaha NS1000M, cleaning the units

Post by markcass » 26 Jun 2019 14:02

Quite apart from the cost of replacement, you really don't want fragments of beryllium flying around! The drive units are perfectly safe if left alone.

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