I have had a Marshall Jubilee half stack since 1990. It was my main gigging and recording amp until i joined TGP and came down with the disease. I found myself liking plexi circuits better and found my Jubilee had too much gain, sounded a little compressed and maybe a bit thin. When I played it I had to keep the gain around 4. My tech looked at it a couple years ago and said the tubes were biased poorly and adjusted that but it didn't do that much. I listened to the first CD I recorded with a Les Paul straight in and it sounded so much more open and crunchy. This was all confirmed at NAMM yesterday when I heard the reissue. That is what my Jube used to sound like. So other than obvious tube or bias issues, can it be something else? The amp is almost 30 years old. Could it be the caps? If they are due for a change, can that effect the tone? Are there any Jube experts on here that can help?