Oh my! (that's what us old farts say a lot). A very pleasant trip down memory lane. Helped a friend of mine in the 70's set up a pair of stacked Advents. We ran them in parallel with no problem with his HK 930 receiver. Based upon what I did with my EPI 100s, we stacked them on their sides with the tweeters inboard, and the whole array plopped on top of concrete blocks to get them up a couple of feet off the floor. This got rid of a lot of the tubbiness. We then towed them in a few inches. This resulted in a wall to wall, floor to ceiling soundstage that could play loud as hell with slam. We then went over the top and hooked up MY HK 930 for true dual(actually quad) mono operation. Oh my!!