Pace, Rhythm and Timing, musical flow.
I hooked up the Almarro to the Tekton Lore early this morning, took out the Ei EL84s and installed Amperex EL 84 Bugle Boy recommended in the Jeff Day 6 Moons review. It was quite nice: No edge, glare or brightness, yet outstanding detail. Large well-defined soundstage with nice layering. Musicality, timbre was excellent, musical flow was fast and tuneful, there was a richness to the sound, as well as just the right amount of warmth; NOT fatiguing at all. My wife and I listened to the RCA Living Stereo Box Set Sample disk, Ella Fitzgerald's "Best of the Song Books", Leonard Cohen, Neil Young, Louis Armstrong, Dave Brubeck. Had a blast. It was fun