I hate to say it, but everyone's system is typically different in significant ways. Then, our hearing differs as well. At 62 my hearing is shot above 12.5 when I remember testing in the past at 18k. I do believe that the improvements will be noticeable to those who's interest has led them to this thread. A much younger hi-fi enthusiast thought the improvement exceeded 20%.

I think the more controversial decision I made will be to use silver wiring. Everyone has heard or professed opinions. I know that Paco has taken all his silver out for a more pleasing result. Of course, his system and XO is not in the least similar. My two cents comes solely from A-B testing over and over different music samples. I don't think these is a better instrument than the ear and brain. Of course, everyone's different here as well.

I found the triplet 22 gauge silver braids improved the treble significantly. It may be the Goertz connections or wire compared to other copper alternatives. I didn't have the time or inclination to try for more improvement with additional copper alternatives. The small diameter silver allowed direct binding to the panel connection plates by laying beside the bass wires and on top of the treble foil leads under the clamping flanges.

The silver performance difference in the bass and lower midrange was not as apparent. I believe it is not worse than the Goertz and could be slightly faster leading to a smoother response without lessening the bass impact. Of course, as the burn-in time for the capacitors and inductor grew towards 400 hours performance continued to improve. This could have contributed to the evaluation process. The bass rewiring tests were last.

I felt the silver's oxidation, being conductive, posed less a threat than the 3/8 inch wide exposed Goertz copper. Connections were much easier with those visible in the photos. High quality copper wires could yield better results. If I were starting today, I would get the Homegrown silver and high quality copper wire for comparing. You could take a short section of Goertz and solder it to the copper wires. The Goertz could then be slipped over the speaker wires under their flange clamps for a contact connection to the speaker.

The panel wires are aluminum. The bass wire is anodized. There is a significant length to this wire on the panel itself. Magnepan's research and practical choices led them to this successful solution.

The most surprising result for me was the improvement without adverse tradeoffs of the Jensen capacitors. I can hardly imagine the performance of the aluminum or copper in oil versions along with their air foil inductor would make. Those choices aren't open to the internal XO solution. Hans J. Jensen personally replied to my simple e-mail questions with courtesy and speed. He helped 'shum' design an fabricate his XO which you can read on this site.

Now, the speaker's spatial tendencies, such as vocal positions, are not changed so much as the stage is expanded in depth and vertical definition. Suffice it to say that I am enjoying the improvements and would do it again in a heartbeat.

As to costs: ( figures include shipping costs)

The 4 metallized paper capacitors by Jensen cost $155 from Welborne Labs.

Two Sledgehammer inductors cost $32.28 from Madisound Speaker Components.

Super Silver braid 22 gauge wire costs $7.75 per foot from Home Audio, plus shipping. I think 6 feet would be sufficient if you are bi-wiring to the 4 plate posts as I did. My needs were satisfied by 4 ft. costing 35.95.

I purchased backing board, black paint, small screws, staples, tubular terminal blocks (cut in sections), and a section of black fabric to cover the XOs and the panel's connectors from view. These probably total less than $24.

These bring my cost per speaker for the XO's to $124.62.

Your cost will be in the neighborhood of $260 for both speakers. That's less than some interconnects!

A view of the speakers set up in my small listening room, (a converted bedroom). The color is shifted lighter due to the teak cabinet inherited from my father.