I built the crossovers last week and they sounded great. Saturday was a rainy day so I opened the cabinets up by pulling the 15 woofers. Once open, I mounted the crossover to the inside of the cabinet, wired the 3 drivers to the network using thick copper zipcord, then after a few tests, Emma and I cleared the tops of the shelves and lifted these 100+ lb monsters up onto the shelves.
We lost a bit of Bass, compared to their previous position on the floor in front of the shelves, but they do sound nice and we have our floor back again!!!