[wavewalker]

Hello
this morning my LA2A (original) sound with a bit high noise level ,
i replaced immediately the tubes with a new oiriginal U-audio set ,
but problem seem don't go away,
somebody have some info about?

what max noise level must be as normal -60db ,-70db ,-80db......?
there is a way to misure it?

thanks in advance to anyone
help me
"WW"