So...today my wife went into NYC with my mother-in-law (visiting from Germany). With loud complaining from my twin 5-year old daughters, I took the opportunity to run the test. I swapped the speaker cables to run directly from my amp. It may well be my imagination, but I found the mids gain an extra degree of clarity and richness (not that I've ever had any complaints about the mids from my MG12s), and the highs seemed a tiny bit crisper (possibly a little too crisp, but not offensive). But the sound could sometimes feel a bit brittle, a bit thin, and a bit flat. Not only that, the bass felt a bit muddled. I attributed the confusion in the bass to the overlap between the full-range MG12s (without a crossover between them and the amp) and the sub. But I was confused by how the overall sound changed for the worse. I kept trying to figure it out, but I couldn't. Eventually I decided to try and resolve the bass muddle by lowering the crossover frequency on the sub. I reached back to the sub, and noticed....it wasn't on! Somehow the power plug had fallen out. I plugged it back in, and all was right with the world. The bass tightened up, the sound became rounded, full and three-dimensional. No problems whatsoever. Glad I tried this!