Been a few years since the last post. Time for an update. I did post more info on my virtual system.
My personal recipe.
Two Quad 57's hooked up to the amp designed for them - Music Reference RM10. This amp also eliminated the need for external tweeters. Functional Quads are good to 18khz. 57's raised (see pic) to eliminate the "head in the vice" ; this also provides for better room filling sound. The 57's are run full from the RM10. The addition of two Dynaudio BM12s using the second set of outputs from the AI preamp completed this package nicely to fill in the bottom octave.
https://goo.gl/photos/QZdmCiRsznquWm797
Here is the great part for me.
Crossover points, Phase and DB levels are set with the remote control from your listening position. 4 set positions on the remote allow for a choice of different setting for different genres. I am using 3 positions right now. Lowest setting - Never off even with vocals as the subs add excellent room ambiance. A Higher DB setting for Classical with its large dynamic swings, and a little less DB level for Classic Rock due to the compression involved. My son's 21 year old friend is a big fan of Lorde. He wanted to take the Quads and subs home with him after hearing his favorite song.
https://www.youtube.com/watch?v=nlcIKh6sBtc
The Dynaudio's remote allows for 15 pushes = 1 db per push (+) or (-) 15 db total.This is can be done for each sub separately; This allows one to account for room irregularities. I found these NOS subs in a Country Studio and was permitted the opportunity to demo them first with warranty. .
One day I may try to coax an audio friend to sell me his Beveridge RM1 Preamp for this room - to complement the RM10; but other than that things are sounding really nice for all music genres in this room.
Happy Listening.