I have now spent a few weeks listening to these speakers and comparing the different crossover networks in different set-ups. First I set them up in the smaller upstairs room. In this location they were powered by a Denon 1912 AVR (90 wpc in stereo mode) with a Sony BDP S-570 as the source. In addition to CD's, SACD's, DVD's and Blu-Ray discs I have music on a thumb drive for this unit in uncompressed wav files ranging in resolution from 44.1Kz/16 bit to 192Kz/24 bit. Speakers were connected with AudioQuest X-2 speaker wire with AudioQuest banana plugs. I was unable to use the Electra Cable B4 speaker wires that came with the speakers because the Denon AVR would not accept spade lugs.
In this system the stock crossovers sounded like the speakers were playing through a veil, kind of subdued, muffled or held back. The modified crossovers sounded more open, cleaner, clearer, and had more depth. This was most noticeable at low to moderate volume levels but still existed at higher levels. With some types of music, like rock, the differences were a little less noticeable. With instrumental and voice pieces the differences were much more apparent. I spent a number of listening sessions over multiple nights comparing the crossovers and the differences were consistent. The more I listened, the less I wanted to switch back to the stock crossovers. When I reached the point where I wouldn't switch back to the stock crossovers I knew this experiment was over, at least for this system.
Next I listened to them with the 2 channel system in my office. This system is powered by a NAD C372 (150 wpc) stereo amp with a computer playing through an AudioQuset Dragonfly DAC as the source. J River Media Center controls the music which is in uncompressed FLAC files with resolutions from 44.1/16 to 192/24. This amplifier would accept space lugs so I compared the different crossovers with both the Electra Cable B4 speaker wires and Blue Jeans Cable 10 White with locking banana plugs into the amp and Electra Tube Connectors to the speakers.
The results were the same. The stock crossovers sounded subdued while the upgraded crossovers were much clearer and cleaner. Different amplifiers, sources, speaker wire, it didn't matter. With every combination the upgraded crossovers were clearly superior.
Actually being able to listen to and compare two crossovers with identical electrical measurements but different quality level components is the best way to answer this question for yourself.
Thanks Danny!
Mike