Bluesman said:
I have it dialed and tweeked in pretty well on each channel, but I listen to some people's clips on the Boogie Board here, and I get a bit discouraged at my apparent lack of ability to make this amp and guitar sing.
Bluesman
Hang in there this is not a plug and play amp it takes time to get a feel. This amp is capable of so much IMHO it can be used for any style of music and still come out on top.
Did you buy it used? You may want to change out the tubes also. If you give it time this amp will not just be a tool to shape your sound and increase your volume, it will become an extension of your playing.
And when you do run across clips you like, you might want to drop an email to that person and see what power configuration they are using. (Maybe you are just not comfortable with the present tube configuration in the amp).
There is allot in the power section alone which makes a huge difference in the tone (and even more with the feel)
In the power section of the Mark IV you can run the following.
Class A or simul-class with (4) 6L6 power tubes
Class A or simul-class with (4) 5881 power tubes
Class A or simul-class with (2) 6L6 power tubes & (2) EL34’s
When running class A with this setup just the EL34’s are engaged.
When running simul-class the mixture of the 6L6’s & EL34’s is sweet this is my current configuration
All the above can be run with pentode or triode
Or the last is to run (4) 6V6’s
This setup can only be run with tweed power and simul-class
All the above are available right out of the box no mod’s needed
Then there are the yellow jackets, which are basically adapters for EL84’s
“Yellow Jackets® Converters are a type of specialized adapters which permit the use of EL84/6BQ5 power tubes in place of 6V6, 6L6, EL34, and 7591 types.”