Hey Tom,
Can you describe your custom 3-ways?
I would be happy to describe the 3-ways Martyo. They started out in life as Ellis 1801s with the "a" crossover and were a
huge improvement over my previous Mission speakers in clarity and refinement. The only thing that I missed slightly from the Mission speakers was a touch of bass and only on certain recordings that I knew had additional information. The 1801s went much deeper than I expected for a two-way but on a few recordings, I knew that there was more information that wasn't fully fleshed out.
I contacted Dennis Murphy who designed the original 1801 crossover, and who is an outstanding gentleman by the way, and he agreed to design a new crossover to add a 10" Peerless woofer that he used in his MBOW1 3-way. I was somewhat apprehensive since I didn't want to destroy the magic of the 1801s just add deeper bass capability and a 3-way crossover can be difficult to get right. I needn't have worried as Dennis designed an awesome crossover and I ended up with exactly what I was hoping for. All the clarity and refinement of the 1801s plus added bass reach. Everything sounded cohesive without any indication that 3 drivers were playing separately.
I built custom cabinets that were as close as I could get to the baffle dimensions as the original 1801 speaker but tapered out to mate with the bass cabinet that housed the Peerless woofer. I also took the opportunity to isolate the top and bottom cabinets with Sorbothane and a 1 inch thick steel plate between the cabinets. This is to eliminate vibrations from the base cabinet transmitting to the upper cabinet. I don't know if it works since I didn't try it without but I can't argue with the results.
Here is a picture of the finished product
