I just got my old Randall NB King 100 amp head back even though I was not impressed with the sound of it through my Marshall 1960a cab with Spawn small blocks in it so I had an idea. I had a BBE sonic maximizer 462 just hanging around in my closet so I decided to hook it up to the Randall and I am telling you that amp went from being a little 4 banger to a board out V-8. Big Big Difference. I HIGHLY recommend adding a BBE sonic maximizer 462 to any half stack that has an effects loop. Turns that amp in to a total beast.