Stereo-CW: Enhancing Your FAVorite Radio receiver

I've written numerous BLOG Entries on the topic of (and variations on) Stereo-Cw.  Last year I wrote
a little piece describing the filters BEHIND the Stereo-Cw technique ([CLICK HERE] to read that.)  Recently, it occurred to me that many readers may have concluded that because I am running
Stereo-Cw using high-end Yaesu transceivers (an FT-1000mp and an FT-2000), a super-duper
radio is necessary to enjoy the merits of this method.

Because the Stereo-Cw  method is accomplished using external audio filter units, in fact, virtually ANY receiver (even a 2-tube regenerative receiver) can benefit by sending it's audio output to these filters.  Then again, receivers with better selectivity will keep adjacent-channel QRM (essentially artifact) out of the input to the separate filters that split the audio into the Left and Right ear. 
Stereo-Cw would seem to deliver its BEST performance when the input filters get their audio
AFTER all IF / AF selectivity circuits have "shaped" the listening passband.

Then again, the PEAK function built into filters like the Autek QF-1 can bring a modicum of selectivity to less-expensive/older receiving equipment (similar to the way that the Heathkit QF-1 brought selectivity to the I-F of cheaply-designed Sw receivers).

Because Stereo-Cw is accomplished simply by splitting and shaping the audio passband, for me,
a question arises about Pre/Post equalization of the audio.  It may be prudent to put an equalizer BEFORE the stereo-Cw facility.  The equalizer can be adjusted to eliminate specific frequencies
in the passband before they get "mixed" with the input audio (resulting in audio-artifact). 
Essentially, an equalizer is a multi-frequency NOTCH Filter, useful for receivers w/o one.

Putting a dual-channel equalizer on the output enables us to do a final cleanup of the audio before it reaches our ears.  My equalizer of choice is the Radio Shack 32-2059 unit, a Dual 15 Band unit that offers full spectrum audio enhancement.  It is an amazingly inexpensive low-profile unit that is quite aesthetically attractive; the position-able sliders provide an at-a-glance graphical representation of
the audio passband.

While upgrading to better receiving equipment is AN answer to our receive WOAHs, a properly designed Stereo-Cw system can be switched to the output of virtually any receiver or transceiver.  When properly adjusted, every receiver circuit including SDR (Software Defined Receiver) units
can be taken to the next level.

In my station configuration, a downside to using the JPS NIR Dsp units in the right channel audio
is that a 130ms delay is introduced which can result in a sort of Left-to-Right "echo" effect.  Using 1990's Dsp chip technology, the 130ms delay is a feature that can't be remedied.  It would therefore seem that the operational answer is to add a switchable time-delay circuit to the left channel which matches the already existing delay in the right channel.

Stay Tuned while I look into adding this design to the interface cabling currently in use.

I guess it all comes down to Experimentation.  Stereo-Cw began as an on-going experiment.

What about YOU?  What audio experimentation have you played around with?