A big knob for monitor control - it's not cheap, but it is nicely made and does exactly what it says it should. For controlling your monitors when no dedicated volume control is to hand.
Line 6's StageSource system includes the L3t Powered Speaker, a smart speaker that knows when it's standing upright on a pole, it behaves like a main, and that when you tilt it on its side, it's a stage monitor. It's just like an iPhone with an accelerometer! It also comes with onboard DSP and Line ...