I picked up the JHS little black amp box and it’s doing a pretty good job in the loop of my SV20h. It’s definitely worth $45. I’m just wondering about the big differences in tone I might be missing out on by not using an attenuator. The JHS does ok but I’m not sure it’s giving me what I need for playing live on those rare occasions where I may need to attenuate. So far I’ve read that attenuators make your power tubes work for the tone where as effects loop volume boxes don’t. I’m just wondering why this is due to the fact that I still have to crank the volumes (loudness) on my amp. Wouldn’t turning the volume on my amp up push the power tubes?