Yes, unless you have an amp loader like this Allan Holdsworth juice extractor I have right here. I was thinking of selling it but I've been re-working my rack and now I'm not sure anymore. Some power soakers just lower the volume of a tube amp to a speaker, while others can BE the speaker. This is one of them. Holdsworth did this with his Boogies all the time, and it is a common practice. You can put the line level signal through an effects processor, or whatever. But if you wanted to take a tube head to a computer, and you didn't have a big budget, then a modeler might be the way to go. I don't like them or have them, but there's no denying that's what they were made to do.