I have had the RA100 for at least 5 months now. It was an Ebay find. Did the usual with a used amp, all new tubes. Also reused my V30's that I removed from the larger Recto 412 cab in favor of EV. V30's in a traditional sized cabinet can't be beat with the RA100. Most of the time I have been using the 100W mode. Sometimes I will use the power soak (set to -3db) and most of the time I love the raw power of the full 100W. I decided to change it up and explore 50W performance in more detail. The Hi/Lo channel never sounded better, actually with the less headroom in 50W mode really impressed me. Why I have not done so earlier, not sure. I guess I am learning you do not need to go all out to get great tone and gain structure. I still have to try this amp with SED =C= 6L6GC's , I am currently using SED =C= EL34. Maybe today I will pop in the NOS Svetlana GT6L6R-2 (same as SED = C= 6L6GC but produced in in the 90's or earlier, not exactly sure date of manufacture).