Dave explains Gain Bandwith Product and how it’s possible to increase your system bandwidth by cascading opamps in series. Also, a discussion on the associated noise issues.
A breadboard example shows how variable GBWP can be, and how it can relate to distortion.
Opamp Noise Tutorial
Dave does basic back-of-the-envelope thermodynamic calculations to prove the Fontus Airo & Ryde self filling ...