I hav3 owned. All but the Khorn and even with the best effort
the Xover by far is the weakest link then connectors ,on series 4
I believe they upgraded the wiring but the Xover parts inside
are on par with Magnepan -Rubbish which I hav owned them also.I have been upgraded Xovers since 2k. Not even average in Anything IMO ,there’s your weak link
upgrade to a much higher quality Xover cap to start
, I see it all to often even in$15-$20k speakers like Magico, and Marten , for example Mundorf
is good, the Supreme is their best Black color caps,the white Evo
is a little better then average the white Evo silver gold oil capacitors this is what these $20kspeakers are using ,Why ? to save $$ .The cornwalls would be very-well suited with these capacitors That are a pretty decent and a good fit ,start with that and maybe Mundorfs Supreme resistors ,a substantial Sonic upgrade. The best capacitor setup I have found even vs the $$
Duelund cast capacitors is the excellent Jupiter Copperfoil caps
with added 3% of the main capacitors value as a bypass cap the best out there VH audio CUTF bypass caps you get the tone and depth as well as pristine topend I just incorporated this in a dac for a friend and preamp this applies to the tweeter, midrange not bass but a bit $$
we just did a Magico A5 which was made a very-good speaker
exceptional , path audio resistors are the RR of resistors at $26 each $$ but great . Just go to Humble homemade hifi capacitor test, Tony has been doing cap reviews for 2 decades and pretty accurate . Vhaudio does not donate free caps for reviews but very well know to DIY and techs , I do use the Vh Odam caps which are very good on some builds ,more neutral but very detailed depending on the system and speakers ,nothing is
a perfect match Synergy is key 🔑.