Speakers: Anything really new under the sun?

Cabinet resonances are an entirely different matter which can be reduced with better internal lining of all surfaces and filling the enclosure with sound absorbing material.

Specific to the speakers that the OP was considering, the review of the model before them had cabinet resonances as a major flaw.

Cabinet resonances can be reduced but can they ever be reduced below the threshold of human hearing?

Generally the good speakers separate the men from the boys in that respect… so yes, they can be reduced to below hearing level, or unmeasurable.

So IME putting grounding wires on these speaker drivers is a bit of a “lipstick on a pig” approach towards fidelity.

Mine are connected to a Russ Andrews RF Router Plug-in.

I agree that resonances can never be fully eliminated but they can be lowed so they have negatable impact.

Here's what I use:

Mundorf Twaron Angel Hair

Well worth investigating along with a sound deadening covering of all internal surfaces to help with lower frequencies.

I agree that resonances can never be fully eliminated but they can be lowed so they have negatable impact.

Here's what I use:

Mundorf Twaron Angel Hair

Well worth investigating along with a sound deadening covering of all internal surfaces to help with lower frequencies

^That^ is all good, but the OP was asking about speakers as a whole system.
Many manufacturers address resonances, and other “State of the art” things. Just it is not clear that the Monitor Audio speakers they were looking at is addressing them.

Maybe they are OK with modifying their speakers? It seems like bracing and deadening the existing speakers could be more worthwhile - but if we knew what’s their new model is doing, we would know whether to mod the old ones, get new ones, or just get something else...

You can apply extraordinary measures to eliminate cabinet resonance and the result is a speaker like those made by Magico.  Is this good?  It depends on whether you like their speakers.  There is no defined engineering path to a great sounding speaker.  Ultimately, we like what we like, and what we like comes down to a personal preference for a particular combination of strengths and weaknesses (i.e., the right compromises) and perhaps even a liking for certain distortions.

If we never come close to agreeing on what is a great sounding speaker, how can we then extrapolate from this uncertain data what is the right approach to speaker design?