Blue,
Your 5000s have teh 4 3 way level adjustments on each speaker.
Setting room size to small and location to free (for lowest low and mid bass levels) might bring the tonal balance to be more like the Grado phones with less bass. I tend to run my 5s with low bass levels by preference, despite being on solid concrete foundation floor. Too much bass can mask midrange detail and probably be further from the Grado sound.
18" to walls might be a tad close, even with treatments. Of course, if you move them out further, the bass level adjustments on the 5000 can be upped if needed to compensate. Each level on the controls adds/subtracts 3 db to the target frequency range. Very useful for helping adjust to room acoustics and something that cannot be done with most speakers these days.
Your 5000s have teh 4 3 way level adjustments on each speaker.
Setting room size to small and location to free (for lowest low and mid bass levels) might bring the tonal balance to be more like the Grado phones with less bass. I tend to run my 5s with low bass levels by preference, despite being on solid concrete foundation floor. Too much bass can mask midrange detail and probably be further from the Grado sound.
18" to walls might be a tad close, even with treatments. Of course, if you move them out further, the bass level adjustments on the 5000 can be upped if needed to compensate. Each level on the controls adds/subtracts 3 db to the target frequency range. Very useful for helping adjust to room acoustics and something that cannot be done with most speakers these days.