Is it good to upgrade the crossovers in your speakers?

For those advising against diy or any crossover upgrades. Did you have negative experience with crossover upgrades? I've been doing diy crossover upgrades for many years, these have never changed the essential character of speaker. I've only experienced improved resolution, more natural timbre with the parts I've chosen. Duelund, Jupiter, Audyn caps, Path, Texas Components TX2575 resistors, Jantzen inductors, Duelund, Furutech internal wiring, never has a single one of these parts not been an improvement over original parts.

There is no magic in most original crossovers, parts often chosen because of cost or space constraints. Crossover upgrades can one of the most cost and/or overall effective upgrades one can make.

I'll be contrary here and say go for it. As long as you're not changing values of components you're not going to change voicing to a huge degree. And the best quality parts are only going to improve timbre, natural sound quality. You can always go back to stock if you didn't like changes. Understand exactly what sound qualities you're looking to improve, do your research on parts you plan to upgrade. Get it right and you're speakers will be much improved.

@artemus_5  As mentioned above 20 year old capacitors getting long in tooth, should probably replace. As far as I'm concerned electrolytics don't belong in speaker crossovers, the issue is whether film caps will fit, large values mean less likely. Now, I"ve heard very good things about the VH Audio ODAM,  not as costly as others and relatively smaller size.  Sonic caps are much lower price alternative to the caps I spoke about in previous post.

I'll relate an interesting interaction I had with Bobby Palkovich (RIP) many years ago. Bobby's life work was development of his Merlin line of speakers, constant refinement of original design. Well, naivety lead me to call various manufacturers, designers in those days to report on various mods/substitutions of parts I made to their equipment. So one day I decide to call Bobby and report on Duelund cap mod I had done to my Merlin VSM-MM bam module and internal speaker crossover. Bobby was not too happy with me ( as were other manufacturers I contacted in those days), but showed some interest in spite of this negativity. Lo and behold, perhaps a year later Bobby was offering the Duelund upgrades to his beloved Merlins. It is to Bobby's credit he was open minded enough to hear me through and try my mods on his design.  Bobby was already aware of boutique caps prior to my conversation as  he was usiing Hovlands at that time, he discovered, as I had the Duelund VSF were an improvement. Many OEM's not as open minded, parts are parts to them, they'll try to convince you the same.

Arguments about issues with sensory perception is problematic here, confirmation bias exists with all equipment, whether oem or modded,  it can always exist. To make blanket claim that all crossover modifications resulting in one hearing sound quality improvements are faulty because of confirmation bias is total nonsense. One could make that argument with every single listening impression posted on this or any forum. This would conform to argument that more expensive equipment is only superior due to confirmation bias, little or no correlation to better sound quality vs. the less expensive component. This is argument for not trusting one's own sensory perception. I could make the same argument in regard to the cheaper component, the value seeking consumer is biased towards the cheaper component.

Individual audio parts make their contribution to holistic sound quality of individual pieces of equipment. The savvy engineer or designer is aware of this and chooses his/her parts accordingly, you do see increasing use of specialized or upgraded parts in audio equipment. The naysayer will state its for marketing purposes, the listener will listen. The experienced listener remains ever mindful of bias, can also control for bias by return to previous configuration.