Wonderful! you will not be disappointed as long as you are connecting with the Spkon cable coming off the main amps outputs (same as main speakers). Upgrading the Spkon cable to one from Signalcable I highly advise as well. Love the system btw :-) When you properly setup the REL your whole system seems to be energized in a way that allows the main speakers to play more freely and the whole system sounds more musical, very special indeed. If you want thump and power get a JLAudio E112 or 110 :-)
http://signalcable.com/relspeakon.html
Matt M
http://signalcable.com/relspeakon.html
Matt M