Electrical and acoustical synergy rule over any upgrade ...
There is no relation with cost...
I listen to low cost speakers right now , i optimized them they sound better than my past Tannoy dual concentric which were vastly superior design over them ...
Why ?
Not only because of synergy as in the OP case but because when i owned the TOP Tannoy dual concentric i know nothing about acoustics and electrical and mechanical embeddings controls of component ... But now all has changed , with an inferior speakers compared to the Tannoy , for sure a good design in spite of being less performant than the Tannoy, i anyway enjoy a more beautiful soundfield ...
Acoustics rules with elementary electrical and mechanical embeddings controls with synergy over the gear design itself ... It is why we must know how and why and which before upgrading ...