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Yamaha NS 1000M left right difference

I have a pair in good shape. I have been listening for them for a few months and enjoyed them very much.
Lately I started feeling the sound is not even between them.

I think the left speaker sounds a bit better more open and clear in mids and highs. It seems like it has slightly higher volume than the other one. It is very subtle but I tested myself for sometime to be sure this is what I hear. I may also be wrong.

They have high and mid L-Pads. The L-Pads are not acting the same. On the left, the one I feel is better, both L-Pads shut the sound (mid or high) when turned all the way left (below -3db). On the right one both do not.
 
Does anyone has experience with it or knows how it should behave when it's working well?
Any idea how I can test the speakers it to be know if they are acting exactly the same or not?


sbenyo

Showing 1 response by georgehifi

georgehifi's avatar
georgehifi
10,312 posts
 
sbenyo


The Lpads are ceramic wire wound in these and are notorious for surface corrosion to build up on the winding's. I cleaned them all up listen and adjusted them to were I was happy, then measure the L and put 2 x 10w quality resistors in their place of the same resistances that they measured. And the sound was so much better without them in the path of the mids and highs.
I did this on the NS1000M, NS1000X and NS2000 that I owned all sounded better with these L-pads taken out of the signal path and just two resistors in their place.

Cheers George
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