I got the TAD Silencer attenuator last week and today is the third day I played with it. I played for about an hour with the volume high enough to make it break. I didn't overdo it though. Just 10-15% after the point were it breaks. I switched between the different channels quite often (I play a JSX) and I didn't realize exactly when it happened, but suddenly it just didn't break anymore. I tried it at higher volumes for a short time and I couldn't get it to break no matter what I tried. I checked the front where all the EQ controls are and it wasn't even hot. Just kinda warm. I don't get it. What happened?
Oh, the JSX is 1,5 years old btw.

One minute I'm playing with power amp saturations and the next it's impossible to get it. It still sounds exactly as before, just that I can't saturate the tubes anymore. So what the **** is going on there?

what do you mean by break ? =/

Sorry, I'm not a native speaker ^^
I ment break up. The tubes didn't become saturated anymore.
I tried it again yesterday. Same thing. Played for 1,5 hours and everything was fine and suddenly no power amp saturation. I triple check all the amp settings and they're definetly not the problem.

the JSX amp on the clean channel is not ment to break up.

it's just that simple.

a much easier way is to put a boost in the effect's loop, and play with it till you get the tone you want rather than using the attenuator.

This statement makes no sense. If it sounds exactly the way it did before, what is the problem? B).

It sounds like you are saying that your amp no longer has anymore natural tube break up, right? Are all of channels affected? I think most guitar stores, will test tubes for free, since the amp is out of warranty, I might start there. Pull all of the tubes and take them back to where you bought the amp, and ask them to test the tubes. You will at least be able to eliminate a potential cause of your problem.

BTW, I tried it today. I turned up the Clean Channel's volume and master to full, and played it through a Bad Cat "leash" Attenuator.

You can get the break up at that volume, however there is no real threshold like in a classic Fender bassman amp.

the way I got it last time was as I mentioned above, was having a boost in the effect's loop, and it worked. However, I did not buy a JSX for that kind of tone.

And your tubes play a huge difference. I noticed that after installing some Groove Tubes rated 5, and comparing it to tube that are rated 1. you will easily get that break up on a tube rated 1-3.

hope that helps and you haven't given up.