Unfortunately, this is no longer available, but perhaps the Related offers may be of interest.
huendeskes THD Hot Plate Attenuator - what a dummy load can do:
The dummy load was invented so that the guitarist doesn't have to go deaf if they like the old rock sound, or just likes to push their gear and practice at home.
The essence of the dummy load is that you crank up your amplifier, then turn down the volume on the dummy load. Essentially, you can adjust the volume from 0. All this with almost lossless sound character.