So I was pretty certain that I had properly diagnosed the problem with my Mark IIC+ as mentioned in this thread: http://guitarscanada.com/Board/showthread.php?t=4255
I picked up a speaker from a fellow forumite and the same problem existed - albeit with a slightly different tone. I tried rotating a new preamp tube through all of the positions and had already tried different power tubes. Once again I tried connecting the amp to a 15" cab I have and the problem disappeared again. I don't have any other guitar cabs to try this with so and I'm frankly flummoxed as to how the amp would sound fine through a 15" cab but not through the combo speaker even when swapped out unless it's the speaker wire/plug. The only thing I can compare the sound to is a really scary sounding fuzz pedal with everything dimed and it fizzles with the decay of the note.
I'm going crazy here and will have to bring it over to someone who has other cabs to try it out with to see what happens. I'm going nuts over this and I guess I will have to take it into a tech, but if there's something else I can try first I'm all ears.
I picked up a speaker from a fellow forumite and the same problem existed - albeit with a slightly different tone. I tried rotating a new preamp tube through all of the positions and had already tried different power tubes. Once again I tried connecting the amp to a 15" cab I have and the problem disappeared again. I don't have any other guitar cabs to try this with so and I'm frankly flummoxed as to how the amp would sound fine through a 15" cab but not through the combo speaker even when swapped out unless it's the speaker wire/plug. The only thing I can compare the sound to is a really scary sounding fuzz pedal with everything dimed and it fizzles with the decay of the note.
I'm going crazy here and will have to bring it over to someone who has other cabs to try it out with to see what happens. I'm going nuts over this and I guess I will have to take it into a tech, but if there's something else I can try first I'm all ears.