I don't like it!
I think it is one more degree of control that I simply don't want to lose. My guitar is connected to a pedal board, multiple cords, multiple pedals, into the amplifier or amplifiers, then is mic'd and sent into the PA. If I am lucky I actually hear what coming our of my amplifier speaker live or through the monitor mix - nearly live. If my guitar sound is distorted by the amplifier speakers I am using, that is just a bit too much. I don't know how to control speaker distortion so can't be sure the sound I am projecting is good, or not. Let's talk more about that...
So, Fat One originals like the Jammer and Clubber, and the Stager with a 210 or 212 Fat One cabinet, have speakers which are selected to be 200% the rated amplifier output power. With everything else that needs to be controlled to have great tone on stage in in a studio, the last thing I need is speakers with unpredictable distortion characteristics. Let's let the amplifier, which has pre-amplifier high and low controls, treble, middle and bass controls, master volume and a presence control be the place where tone is crafted. Notice all those knobs are controls. Let's use them for more control.
The speakers are critical components in creating the amplifier's tone. Maybe 50% of our guitar tone is as a direct result of the speaker(s) we use. Let's let those speakers shine as sound reproduction devices accurately broadcasting the sound of our amplifiers. Maybe in a studio where one amplifier is used in one place with one mic and in one setting, you may be able to dial in settings for the optimum speaker distortion, but in the world of playing on stages, in shows and practices, with a variety of songs and the demands of dynamic set lists you need control to get your best sound. I say don't let your speakers take that control away.
