I purchased a Mesa Walkabout Scout 3 years ago. Since then, I have blown two speakers. I keep the Gain and the Master Volume set at 12 o' clock and very very rarely go beyond that. It is my first tube amp, so I'm not sure if I'm doing something wrong. I had never blown a speaker prior to this, going back nearly 15 years. Am I doing something wrong or am I unlucky. Also, the Scout replacement speaker is 300 watt at 8 ohm. It costs $120. Is there a comparable replacement for less? Thanks.