Which PreAmp for Marantz PM KI Ruby

Preamps are mostly for switching. No telling if you have any purpose.

As a buffer they can improve sound. Or not.

Preamps are mostly for switching.

...and providing the amp the signal, level, and impedance they are looking for. 

Interesting. The reason I considered the upgrade was that when I played around with the RME as pre amp, I noticed a considerable difference in sound quality, mainly soundstage and imaging improved (to my shock). There’s a chance that it may not be an improvement to some people, but can’t deny the fact that there was an audible difference.

@russ69 in addition to space constraints (NYC apartment), I’ve always liked the tightness of a bookshelf. I also have to admit that I compared towers in the same price range or less as the dynaudio bookshelf’s I own. Any speaker recommendations that will share good chemistry with the rest of the gear (assuming i keep the electronics)?  

Any speaker recommendations that will share good chemistry with the rest of the gear (assuming i keep the electronics)?  

Triangle Signature Thedas, maybe? Probably any of the next level bookshelf loudspeaker.  

Thanks @russ69 I’ll check it out.