That's a bummer. I've only seen that red light once over the past 4.5 years.
I have read more issues with Evo400s than 300s over the years - just what I have read it seems. That may not be the case but seems like it. I'm in Tampa now so good to have fewer tubes in the summer anyway.
I need to update my system pics here, but they are on Townshend Podiums (which made an LOL difference, as I call them) which are on a concrete slab. Here is pic of my room it if this works here. Curtains are closed when listening and I have some diffusion panels I put up behind the plants. Sorry for the detour OP. I will add that I listen mostly to rock music and usually loud so I feel that my next amp will likely need at least what I have now which is about 45 per channel - but not 100% sure about that. I don't even know enough to be dangerous, but have somehow managed to put together a really good sounding system /room. I do think that getting the right tubes working together really helped - and took some experimenting to get there.
