The top end from the R series is more gentle, is not that tipical details in your face that gonna make most recording sounding bad
But you can always boost the top end with EQ, there is plenty of headroom because the speaker can play very loud, so yeah you can boost the bass, mids or highs, there is no problem in adding more top end to the speaker.
The coaxial was never supposed to make the speaker less sensitive to placement, the woofers are the problem in the room and these woofer have the typical design woofer + port, they aren't cardiod. There is design like whaferdale evo 4.4 that have the port in the middle, these port are a little more room friendly than the back-ports.
It's the typical hard to get right design ( woofer + back port ). You must EQ the speaker-room.
If the top end it's the problem and you want more sparkle in the cymbls and more '' hifi '' sounding you can always add a High shelf filter in APO EQ, it's very easy to do the filter, once you do that adjust to your personal taste, personally the sparkle in my r7 it's fine to me
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