Do you know your speakers from the inside?
It could be that this is may be better so ...
We have been dealing with the development and modification of loudspeakers for nearly three decades and are familiar with a lot of loudspeakers from within.
In short, it is sometimes quite shocking how economical many manufacturers even for high-priced high-end speakers are in selecting crossover components, internal cabling, insulation and connection terminals.
Cheap capacitors and cement resistors in the high-frequency signal, distorting core coils in front of midrange drivers, cheap litz cables and brass connections.
The high-gloss finish seems often more important than the sound.
Do you know how much potential is slumbering in your speakers?
Here are some examples of official frequency tuning and tuning: