I have Ref 3A Grand Veenas, which come with some Bybee filters wired internally, although not as expensive or the same as what you are referring to,so perhaps this comment is off base.
I really enjoy the sound of these speakers and I've owned lots of speakers in the past including stacked Quad 57, sngle pair of 63, Martin Logam CLS, Rogers LS3/5a, Tannoy Ardens, Meadowlark Herons,VR4,Acoustat3,to name names.
Some pretty exotic speakers,but no filters.
So maybe the Bybees are why I like my current speakers ?
If you can try before you buy and feel they are worth the investment do it, but for that money you could buy a used pair of Grand Veenas.
I really enjoy the sound of these speakers and I've owned lots of speakers in the past including stacked Quad 57, sngle pair of 63, Martin Logam CLS, Rogers LS3/5a, Tannoy Ardens, Meadowlark Herons,VR4,Acoustat3,to name names.
Some pretty exotic speakers,but no filters.
So maybe the Bybees are why I like my current speakers ?
If you can try before you buy and feel they are worth the investment do it, but for that money you could buy a used pair of Grand Veenas.