[NAMM] Rivera Rockcrusher Power Attenuator
The new Rockcrusher attenuator handles 120 watts and features a stepping switch controlling a reactive load.
Unlike the simple resistive loads used in many attenuators, this means the Rockcrusher responds more like a loudspeaker and doesn't mess with your amp's tone, according to its manufacturer.
The Rockcrusher also features switchable input impedance, EQ controls, and separate balanced and unbalanced line outs.
Have a look at Californian amp designer Paul Rivera Sr. explaining the Rockcrusher's features: