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Difference between Amperex 6922 pinched waist tube

I wonder if there are differences in the Amperex 6922 pinched waist gold pin tubes that I have heard about. I see some were made in Holland and some were made in the US. Is one supposed to be superior to the other. I have read that they are pretty much the holy grail of Amperex tubes. I just picked up some Siemens CCa tubes and really am impressed but figure I may as well see what else is in their league. Thanks for any advice as I could always use it.
nicksgem10s

Showing 1 response by uunderhill

uunderhill
3 posts
 
In general, I've with found for the same model of Amperex tube,the Holland made tube sounds warmer, with sweeter highs, than the equivalent USA made tube.

However, I've found USA made Amperexes sound more dynamic and have more bass.
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