I think many here that are not into modeling just yet have some questions about what exactly the effect of a CAB Impulse Response is in an FRFR setup. This post focuses on the AXE FX but pertains to any modeler that can load a CAB IR. It's important to note that besides the hundreds and hundreds of amp models and thousands and thousands of presets: you also have literally tens of thousands of CAB IRs to choose from. What is a CAB IR? Quite simply it is a profile of a standard guitar cabinet that has been captured. When played into a system that has a FRFR or Full Range Full frequency system. The player gets to acually have at his disposal every cabinet ever made. He can then shape his tone even further then a simple preset choice. This file is simple me playing an Em chord and progressing up with a few power chords. When I make it back to the Em chord you will hear as the chord is ringing out, the CAB IR change. AXE EDIT makes it really really easy to audition any and all cab irs in real time. So here ya go. Any questions just ask. The preset used is a stock JCM 800. The CAB IRs I am using are from the new Ownhammer Player Pac. The preset is never changed or altered. Only the CAB IR is cycled. The entire file is one continuous recording with no edits. https://app.box.com/s/7klnscadm7ihmqtf9h7kbo4fn7fc5pvy This is what it looks like in AXE EDIT. The first bunch of these CAB IRs were cycled in the recording. Now imagine the possibility of having literally millions of combinations to choose from. A Tube amp really demonstrates just how limited they are when considering what modeling at a high level brings to the table. .