Unison Unico SE noise

Dumb question time - where is your ear when you hear this low level noise. In the listening position or at the speaker? If the latter you may just be hearing the noise floor of your amp or, more probably the noise floor of the particular tubes Wally installed.

There are tubes and then there are tubes teted for 'low noise'. A lot of tube electronics need LN tubes to avoid a low level sort of hiss. If you are only hearing this when your ear is next to the speaker, either forget about it or buy some especially low noise tubes.

BTW, do I assume that you listened for, and did not hear, this noise previously?

I tried unhooking all the interconnects. Even with all of them unhooked, the noise is still there.

Okay Newbee, I think you are right. I can't really hear the hum/static from my listening position. I have to get close to the speaker to hear it. I certainly do not hear it when the tv is on or when I am playing music. Thanks for the input so far guys.

although there is noise from both speakers, it is really bad, loud in the right channel. It is a lot louder then when I first posted about the problem earlier. So I opened up the amp and switched the tubes from one side to the other. Sure enough the heavy static noise moved to the left side so that means it is a bad tube. These are the mullard CU 4003s (12AU7s). I know I need to replace the one tube, but my question is are the mullards a little noisey anyways?