I’ve owned a 4x4 pro w/ reactive load attenuator and it was a cool unit for sure. The attenuator did its job. Once I got my hands on a Fryette power station though it spoiled me and the attenuator on the deLisle sounded like ass in comparison.
In my experience, most attenuators without any sort of eq adjustment compensation for low level playing just doesn’t cut the mustard. It always sounds like there is a wool blanket over your tone. This was the case for the deLisle as well.