Maximizing the Art of Experimentation: Part 4: Equalizers Equalize Equally

I have said before that today's solid-state transceivers are so complex, the only thing we can
homebrew anymore are improvements to what Goes INTO the radio (by way of the antenna system) and what comes out at the audio-end: by way of audio enhancers (the MFJ-752 line) and DSP units (MFJ-784 for the Left-Ear and a cascaded JPS NIR-10 --> NIR-12 DSP units for the Right-Ear).

The next phase of this setup is to wire-in a multi-pole rotary switches supported by a set of toggle switches enabling the option of selecting:

1. QF-1A's In/Out of circuit, either BE-4 or AFTER the audio chain.
2. A reversible cascade arrangement of MFJ-752C --> MFJ-784 DSP.
3. An MFJ-752B reversible with a reversible NIR-10/NIR-12 DSP units.
4. Swap-able Left-Channel <---> Right-Channel, either BE-4 or After
   the audio chain.
5. EQUALIZER In-Line - Left-Switch and/or Right-Switch.
6. Momentary-Contact and PB switches in series ([MUTE]).

The MAIN focus of this blog entry is to re-examine the world of stereo audio equalizer units. 
While there are multi-dozens of equalizer variations, some BiG and some Small (tho most Bigger
than I would like) I stumbled onto an extremely compact Radio Shaft equalizer; arguably the BEST general-purpose equalizer ever made, with 15-bands of equalization for each channel (15 X 2 = 30).

Now depending on who to believe, the equalizer should either be inserted BE-4 the array of audio filters and DSP's, or, to clean things up AFTER all of the audio processing has been introduced its artifact(s).  You may remember the QST DR's answer to my question ([CLICK HERE]).  In fact, the
Dr. never really answered my question; choosing instead to educate me with background data from which to deduce the answer myself by understanding the fundamentals underlying my inquiry;
hence the need for a comprehensive audio switching arrangement.

There are custom equalization units designed specifically for amateur radio use. 
However, while they may be physically smaller, I have found the Radio Shaft unit to be more
flexible, more comprehensive, more aesthetically pleasing and physically more adaptable to
the operating environments I use it in.  With a electrical placement switch, it can be inserted
BE-4 or AFTER the stereo audio lines, or, bypassed altogether, giving an excellent point of
comparison.

What about YOU?

Do YOU make use of audio equalization?

How does it work for you?