I am looking for some opinions on rolling the tubes in my Antique Sound Lab 1003DT. I have been pretty happy with it over the past year or so, but feel the need for a change. I am looking for something has a more open sound and/or maybe a bit more aggressive. I currently am using a combination of Mullard and Sylvania for the input and driver tubes. I have read a few places that people were having great success with swaping out the 12AU7 for 12BH7's. Any one tried this and care to share their thoughts?
