Good question 🙂. There may be something to it.
The Power control, controls ratio exclusively.
The Rock preset at Power 50, runs the Input AGC at Infinite:1, and Multiband at 4.0:1.
At Power 36, the Input AGC runs at 7.1:1, and the Multiband at 2.6:1.
That’s pretty light multiband ratio (Reference Settings is 2.0:1) but nevertheless, ratios multiply, so 7.1:1 and 2.6:1 is a total of 18.46:1. That really should not be leaving much dynamics.. I mean, 18.46dB to 1 means that if you input 0dB, you’ll get 0dB out, and if you input -18dB, you’ll get -1.0dB out. That sounds pretty close to me. 🙂
///Leif