I recently went to the studio to record some tracks and i used my mesa head. All of a sudden something started to smell real bad from the amp and when i checked the back three tubes where dead and a fourth shut down as i looked at it so i turned it off. I did a very big mistake when i powered it up, i forgot to plug in the speaker cable, and the master was turned up as well. I haven't tried to power it up again. What might have happened? Is it worth trying with new tubes of have i screwed it up completely? My biggest fear is that the power transformers are fu#ked up. The amp was working the whole time, i wouldn't have recognized it if it wasn't for the smell. Im very thankful for any help and answers!