Recently traded out my stock speaker in my fender blues deluxe 40w 8 ohm amp with a 75w 8 ohm weber blue dog. It was an easy swap and sounded great. This morning with 2 1/2 on the amp volume it suddenly sounded like a blown speaker. Got nervous and did some speaker checks trading out the old and new speaker and it sounded fine. Put it all back together and now same resultant as before. Did I get a bad speaker? Could it be a tube issue? Bad speaker connector? Compatibility issue with the new speaker?